Trapped civilians and rebels are waiting to leave east Aleppo in Syria after a new deal was reportedly reached for evacuations to resume.
Government and rebel sources say the agreement will allow people to leave several besieged enclaves in Syria.
But hours after the announcement, aid agencies were still waiting for the operation to start.
At least 6,000 people left east Aleppo under a fragile truce on Thursday, but evacuations stopped a day later.
The area has seen rapid government advances in recent weeks.
As well as east Aleppo, the deal is also said to include the evacuation of two other rebel-held towns and two towns loyal to the government.
Confusion reigned on Friday morning when the evacuation, which was taking place along corridors out of Aleppo towards rebel-held areas (Khan al-Asal and Khan Touman), was stopped.
The government said rebel fighters had fired on the convoys at a checkpoint at Ramousseh. Rebels said pro-government forces opened fire.
Image captionEvacuees are being taken from east Aleppo to Khan al-Asal and Khan Touman
The United Nations Security Council is expected to vote over the weekend on a French-drafted proposal to ensure the operation is co-ordinated by international observers, with humanitarian aid allowed into Aleppo and hospitals given protection.
Correspondents say thousands of cold and hungry civilians remain stranded in the rebel-held east of the city, waiting to be moved to safety.
The International Committee of the Red Cross (ICRC) called on all sides to provide guarantees and allow the evacuation to be completed.
“It’s important that the parties on the ground do their utmost to end this limbo,” ICRC Syria head Marianne Gasser said in the statement.
“People have suffered a lot. Please come to an agreement and help save thousands of lives.”
Media captionWounded evacuees from eastern Aleppo in Syria have been brought to Idlib, south west of the city, for medical help
What does the new agreement involve?
On Saturday various government and rebel sources confirmed that a deal had been reached, which included the following:
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The continuation of the evacuation of civilians and rebels from eastern Aleppo
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The evacuation of “humanitarian cases” from the mainly Shia towns of Foah and Kefraya, besieged by rebels, in Idlib province
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The evacuation of wounded from two government-besieged towns near the Lebanese border – Madaya and Zabadani

