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Ukraine crisis: Nato sees 'significant' Russian troop pullback Ukraine crisis: Nato sees 'significant' Russian troop pullback
(about 1 hour later)
Nato says it has observed a "significant" withdrawal of Russian troops from eastern Ukraine, but adds that some forces still remain there.Nato says it has observed a "significant" withdrawal of Russian troops from eastern Ukraine, but adds that some forces still remain there.
Lt Col Jay Janzen says it is difficult to determine the number of soldiers in Ukraine, as pro-Russian separatists control several border crossings.Lt Col Jay Janzen says it is difficult to determine the number of soldiers in Ukraine, as pro-Russian separatists control several border crossings.
Moscow denies arming the rebels and sending Russian troops to the Donetsk and Luhansk regions.Moscow denies arming the rebels and sending Russian troops to the Donetsk and Luhansk regions.
More than 3,200 people have been killed in clashes that erupted in April. UN officials say 3,245 people have been killed since fighting began in April.
A shaky ceasefire has held since 5 September, and the two sides have since agreed to set up a 30km (19 miles) buffer zone.
But there were reports of overnight shelling in Donetsk, Avdiivka and Debaltseve.
In March, Russia annexed Ukraine's Crimea southern peninsula - a move condemned by Ukraine and the West.
'Special forces'
"There has been a significant pullback of Russian conventional forces from inside Ukraine, but many thousands are still deployed in the vicinity of the border," Canadian Lt Col Janzen said on Tuesday.
"Some Russian troops remain inside Ukraine. It is difficult to determine the number, as pro-Russian separatists control several border crossings and troops are routinely moving back and forth across the border.
"Further, Russian special forces are operating in Ukraine, and they are difficult to detect," Lt Col Janzen added.
Ukrainian officials have repeatedly stated that thousands of heavy-armed Russian troops remain positioned on Ukraine's eastern border.
On Tuesday, Ukrainian military journalist Dmytro Tymchuk said a Russian troops build-up also continued in northern Crimea, where "several air defence systems were moved".