Gunmen loyal to Hezbollah have shut a pro-government TV station and newspaper as battles continued between the group and Lebanese government supporters.
Most areas of the Muslim western half of Beirut have now been taken over by Hezbollah, as battles between the group and government supporters continue.
Future News, owned by Saad Hariri, the leader of the pro-Western governing coalition, went off the air as fighting entered a third day.
Gunmen loyal to Hezbollah and its Shia opposition allies have forced the shutdown of pro-government media.
The offices of Mr Hariri's al-Mustaqbal newspaper were reportedly set ablaze by opposition gunmen.
Fighting began after a government move to shut Hezbollah's telecoms network. The group is backed by Iran and Syria.
Fighting erupted over a government move to shut Hezbollah's telecoms network.
At least 10 people, mainly civilians, have been killed and dozens injured in the city in three days of clashes.
At least 10 people, mainly civilians, have been killed and more than 20 injured in several parts of the city since the clashes began.
Militants loyal to Hezbollah attacked media offices owned by Saad Hariri, a leader of the pro-Western governing coalition.
The United Nations Security Council urged the rival parties to stop fighting immediately amid fears of a return to civil war.
'Cut off the hand'
Correspondents say the bloodshed amounts to the worst internal strife since Lebanon's 1975-90 civil war.
The army moved in after gunmen besieged TV station Future News and partially set fire to the offices of al-Mustaqbal newspaper. Mr Hariri's radio station was also silenced.
'Save Lebanon from hell'
Hezbollah leader Hassan Nasrallah called Tuesday's move to close the movement's telecommunications network a "declaration of war".
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Gunfire on the streets of Beirut
Gunfire on the streets of Beirut
He vowed to "cut off the hand" behind the decision, in a speech on Thursday.
A compromise was reached for the premises to be taken over and protected by the Lebanese army at the price of going off the air.
Clashes continued into Friday morning as gunmen fought with rifles and grenade launchers in central and southern areas of the city.
The Lebanese army command has warned its unity is at risk if the ongoing political crisis and civil unrest in Beirut drags on.
The unrest virtually shut down Lebanon's international airport for a third day as burning barricades closed major highways in Beirut.
Other offices previously manned by Mr Hariri's followers in different parts of central and western Beirut were left burnt out and abandoned.
Earlier, the Lebanese army command warned its unity was at risk if the ongoing political crisis and civil unrest in Beirut continued.
The urban warfare has shut down Lebanon's port and all but closed the international airport, with burning barricades on major highways in Beirut.
Mr Hariri has called on gunmen from both sides to withdraw from the streets "to save Lebanon from hell".
Correspondents say the bloodshed amounts to the worst internal strife since Lebanon's 1975-90 civil war.
The Sunni leader also said Hezbollah should lift its "siege" of Beirut, and called for a meeting with Sheikh Nasrallah as soon as possible.
Within the first few hours of daylight on Friday, much of the fighting appeared to have died away, after a night of constant gunfire and explosions.
Mr Hariri also proposed a compromise on the government decision to close down Hezbollah's telecommunications network, calling it a "misunderstanding" and saying the army would have the final call.
'Save Lebanon from hell'
On Tuesday, the government declared the group's fixed-line network covering its strongholds of south and east Lebanon, and southern Beirut, illegal, saying it was a threat to state security.
With Hezbollah fighters moving around most areas of Beirut unopposed, the BBC's Jim Muir in Beirut says it all amounts to a humiliating blow to the Western-backed government.
Sheikh Nasrallah had earlier said his group's military wing regarded the network as "the most important part" of its defensive measures.
It appears to have badly overplayed its hand in moving to close Hezbollah's telecoms network on Tuesday, says our correspondent.
Hezbollah leader Hassan Nasrallah called the move a "declaration of war" in a speech on Thursday.
Mr Hariri has proposed a compromise, calling its move a "misunderstanding" and saying the army would have the final call.
The Sunni leader called on gunmen from both sides to withdraw from the streets "to save Lebanon from hell", as he called for a meeting with Sheikh Nasrallah.
The government had declared illegal Hezbollah's fixed-line network covering its strongholds of south and east Lebanon, and southern Beirut.
The United Nations Security Council has urged the rival parties to stop fighting immediately amid fears of a return to civil war.
Are you in Beirut? Have you been affected by the fighting? What is the situation in your area? Send us your comments using the form below:
Are you in Beirut? Have you been affected by the fighting? What is the situation in your area? Send us your comments using the form below:
