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Ukraine maps: At-a-glance guide to the Russia war Ukraine maps: Tracking the Russian invasion
(about 20 hours later)
Russian troops have expanded their offensive across Ukraine as they continue attempts to encircle and cut off the capital Kyiv. Russian troops continue to face sustained Ukrainian counterattacks and mounting casualties as they attempt to encircle and cut off the capital Kyiv.
Here are the latest developments on day 17 of the invasion: Here are the latest developments on day 18 of the invasion:
Intense fighting to the north-west of the capital Kyiv Ukraine says Russian missiles have hit a military training base near the Polish border
People in Mariupol are said to be enduring freezing temperatures with no power, and little food and water
Russian forces are now 25km (15 miles) from the capitalRussian forces are now 25km (15 miles) from the capital
Mykolaiv in the south-west of Ukraine is under heavy bombardment
Southern city of Mariupol continues to be besieged and is without power
New artillery and air attacks on the cities of Dnipro and Kropyvnytskyi
Russia launched its attack in the early hours of 24 February from three main directions: north, south and east.Russia launched its attack in the early hours of 24 February from three main directions: north, south and east.
Targets all over the country have been attacked from land, sea and air.Targets all over the country have been attacked from land, sea and air.
Among the latest attacks was a missile strike on a military training base, west of Lviv, near the border of Poland.
The facility has been used by Nato trainers.
Ivano-Frankivsk has also been hit.
The fight for KyivThe fight for Kyiv
Russian forces are attempting to encircle and cut off the Ukrainian capital, with troops now moving towards the city from multiple positions.Russian forces are attempting to encircle and cut off the Ukrainian capital, with troops now moving towards the city from multiple positions.
Recent satellite imagery shows that after days of sitting idle on an arterial road north of the city, a massive Russian armoured column has now moved southwards, dispersing into forests outside Kyiv and moving its artillery and rocket launchers to within range of the capital. A 40 mile long Russian armoured column has now dispersed into the area west of Kyiv, moving more artillery and rocket launchers to within range of the capital.
A failure to take Kyiv would mean a failure of the whole campaign, with dangerous political consequences for Mr. Putin back home, according to the BBC's Security Correspondent Frank Gardner
The city is bracing itself for an assault, with Ukrainian forces and volunteers building new defences and creating barricades on major routes to slow any Russian attack.The city is bracing itself for an assault, with Ukrainian forces and volunteers building new defences and creating barricades on major routes to slow any Russian attack.
An advance by Russian troops heading for the capital from Sumy in the east has also made some significant progress in recent days. Russian forces made some limited advances towards the eastern side of Kyiv on Saturday, but did not conduct offensive operations to the city's north-west, according to the Institute for the Study of War (ISW).
The movement around Kyiv suggests Russian troops may be preparing for a siege of Kyiv rather than a full-on assault, according to Dr Jack Watling, of the Royal United Services Institute, a defence think tank.
War in Ukraine: More coverageWar in Ukraine: More coverage
LIVE: Latest updates from on the groundLIVE: Latest updates from on the ground
KYIV: Capital turns into a fortressKYIV: Capital turns into a fortress
MERCENARIES: How Russia is recruiting reinforcementsMERCENARIES: How Russia is recruiting reinforcements
HERITAGE: Lviv hides its priceless artefactsHERITAGE: Lviv hides its priceless artefacts
IN DEPTH: Full coverage of the conflictIN DEPTH: Full coverage of the conflict
Slow Russian progress in the northSlow Russian progress in the north
Although Russian troops are now making gains on the outskirts of Kyiv, their progress in the north has been much slower than in the south. Although Russian troops have pushed forward towards the outskirts of Kyiv, their progress in the north has been slower than in the south.
The main advance towards the capital initially came from Belarus down the west side of the Dnieper River via Chernobyl.The main advance towards the capital initially came from Belarus down the west side of the Dnieper River via Chernobyl.
The large Russian column heading for Kyiv faced strong resistance after reaching Hostomel airport to the north west and also suffered logistical issues, including a shortage of fuel. Russian forces have faced serious logistical problems, with many vehicles running out of fuel, and strong Ukrainian resistance. Hostomel airport has changed hands several times.
To the north east, Russian forces have continued efforts to take the city of Chernihiv, pummelling it with shells and rockets and reducing parts to rubble, but have yet to advance down the east bank of the Dnieper River. On Saturday, Russian troops resumed attacks on the north-east side of Kyiv, with fighting reported near Brovary.
Fighting was also reported around Chernihiv, which has been pummelled with shells and rockets, reducing parts of the city to rubble.
Big Russian gains in the southBig Russian gains in the south
Russian forces have made rapid gains across the south of the country, advancing east and west from Crimea.Russian forces have made rapid gains across the south of the country, advancing east and west from Crimea.
In the south-east, there is growing concern for tens of thousands of civilians trapped in the port city of Mariupol, which is encircled by Russian forces.In the south-east, there is growing concern for tens of thousands of civilians trapped in the port city of Mariupol, which is encircled by Russian forces.
It has held out since the early days of the invasion but at huge cost. The UN says civilians in the city "desperately need aid, especially life-saving medical supplies". Russian troops have now taken part of the east side of Mariupol, but the west of the city remains under Ukrainian control.
People are trapped without food, running water or electricity and bodies have been buried in mass graves.People are trapped without food, running water or electricity and bodies have been buried in mass graves.
Russian forces advancing from Kherson are now firing on Mykolayiv as they move west. Russian forces have been heading north in the direction of Zaporizhzhia, but may struggle to take the city whilst large numbers of Russian troops remain committed to the fight in Mariupol, according to the ISW.
They have also been reinforcing positions around Mykolaiv. An air strike in the city killed nine people on Sunday.
The BBC's Security Correspondent Frank Gardner says the prize here for Russia is the strategic port city of Odesa to the southwest: "The city has had plenty of time to build its defences but if and when Russia does attack it will likely be a multi-pronged assault using amphibious forces in the Black Sea combined with air mobile units deployed inland. If Odesa is captured it would effectively cut Ukraine off from the sea."The BBC's Security Correspondent Frank Gardner says the prize here for Russia is the strategic port city of Odesa to the southwest: "The city has had plenty of time to build its defences but if and when Russia does attack it will likely be a multi-pronged assault using amphibious forces in the Black Sea combined with air mobile units deployed inland. If Odesa is captured it would effectively cut Ukraine off from the sea."
New air strikes in the eastNew air strikes in the east
Explosions were heard in Dnipro, a key city on the Dneiper River, on Friday morning - the first time Russia has targeted it since its invasion. Fighting continues in the Donetsk region. On Sunday, a monastery being used to shelter more than 500 refugees, including 200 children, was damaged by an airstrike on a nearby bridge.
Attacks resumed on Saturday morning with air raid sirens heard across the city. Dnipro has come under attack in recent days and is strategically important as a point of convergence for Russian troops coming from the south and east.
Dnipro is full of heavy industry - including a rocket factory - and is strategically important as a point of convergence for Russian troops coming from the south and east. Russian forces in the Kharkiv region have continued operations, seizing parts of Izyum.
Kharkiv, the second-largest city in Ukraine, continues to face intense aerial bombardment but Russia has not renewed attempts to take the city. Artillery attacks on residential areas of the Kharkiv city are being investigated by United Nations (UN) prosecutors for possible war crimes.
Artillery attacks on residential areas of the city are being investigated by United Nations (UN) prosecutors for possible war crimes.
Russian forces in the area have continued operations to the south east of the city, analysts say, with efforts launched to seize Izyum.
Thousands flee across bordersThousands flee across borders
Since the invasion began, more than 2.5 million people have fled Ukraine, according to the UN. Since the invasion began, 2.7 million people have fled Ukraine, according to the UN.
It is the fastest-growing refugee crisis in Europe since World War Two.It is the fastest-growing refugee crisis in Europe since World War Two.
Unicef, the UN children's agency, believes around half of them are children and young people.Unicef, the UN children's agency, believes around half of them are children and young people.
How many refugees are there?How many refugees are there?
By David Brown, Bella Hurrell, Dominic Bailey, Mike Hills, Lucy Rodgers, Paul Sargeant, Mark Bryson, Zoe Bartholomew, Sean Willmott, Sana Dionysiou, Joy Roxas, Gerry Fletcher and Jana Tauschinski.By David Brown, Bella Hurrell, Dominic Bailey, Mike Hills, Lucy Rodgers, Paul Sargeant, Mark Bryson, Zoe Bartholomew, Sean Willmott, Sana Dionysiou, Joy Roxas, Gerry Fletcher and Jana Tauschinski.
About these mapsAbout these maps
To indicate which parts of Ukraine are under control by Russian troops we are using daily assessments published by the Institute for the Study of War with the American Enterprise Institute's Critical Threats Project.To indicate which parts of Ukraine are under control by Russian troops we are using daily assessments published by the Institute for the Study of War with the American Enterprise Institute's Critical Threats Project.
From 2 March this daily assessment differentiated between "Assessed Russian-controlled Ukrainian territory" and "Assessed Russian advances in Ukraine", the latter indicating areas where Russians are believed to have launched attacks from but which they do not control.From 2 March this daily assessment differentiated between "Assessed Russian-controlled Ukrainian territory" and "Assessed Russian advances in Ukraine", the latter indicating areas where Russians are believed to have launched attacks from but which they do not control.
To show key areas where advances are taking place we are also using daily updates from the UK Ministry of Defence and BBC research. To show locations where there have been attacks or explosions we are using reports that have been verified by the BBC.To show key areas where advances are taking place we are also using daily updates from the UK Ministry of Defence and BBC research. To show locations where there have been attacks or explosions we are using reports that have been verified by the BBC.
The situation in Ukraine is fast moving and it is likely there will be times when there have been changes not reflected in the maps.The situation in Ukraine is fast moving and it is likely there will be times when there have been changes not reflected in the maps.