More airstrikes and artillery shelling on Monday hit the northern Syrian city of Raqqa, the de facto capital of the Islamic State group, as U.S.-backed fighters pushed closer to the extremists' stronghold, activists said.
The developments come ahead of what is expected to be a major battle for Raqqa in the coming weeks.
Airstrikes have intensified over the past days as U.S.-backed fighters have pushed on toward the city, getting closer to it from all sides. The Kurdish-led Syria Democratic Forces captured dozens of towns and villages under the cover of airstrikes by the U.S.-led coalition since November, when the group began an operation entitled Euphrates Wrath, aiming to eventually surround and capture Raqqa.
SDF fighters have surrounded Raqqa from the north, west and east. The extremists still have an exit from the south, even though the U.S.-led coalition destroyed two bridges on the Euphrates River south of Raqqa.
The Britain-based Syrian Observatory for Human Rights said the city was pounded by warplanes and artillery since early morning. The activist group had no immediate word on casualties from the new airstrikes, adding that about 38 people have been killed in Raqqa and its suburbs over the past three days
The activist-operated Raqqa is Being Slaughtered Silently said that since Sunday, the U.S.-led coalition carried out more than 30 airstrikes on the city, killing 35 people and destroying a school on Raqqa's northern outskirts.
On Sunday, opposition activists said the U.S.-led coalition dropped leaflets in Arabic on Raqqa, urging residents to leave the city. Some leaflets gave instructions of how to leave Raqqa, calling on people to keep their plans secret from IS and to leave without any weapons and waiving a white banner.
"This is your last chance. Failing to leave could lead to death. Raqqa will fall. Don't be there when it happens," read one of the leaflets.
IS has been preventing people from leaving Raqqa and many fear that residents will be used as human shields when SDF, the most effective force fighting the extremists in Syria, begin marching in the city that has been held by IS since January 2014.
In the capital, Damascus, the governor said the evacuation of the last group of opposition fighters and their families from the northeastern neighborhood of Barzeh was completed, after a batch of over 1,000 persons left. The Observatory said the ones leaving Monday have rejected an amnesty from the government.
The evacuation of Barzeh leaves only one neighborhood on the edge of Damascus, Jobar, in the hands of opposition fighters. A series of evacuation deals in the area in recent months leaves the government of President Bashar Assad firmly in control of the capital, once encircled by rebels.
The government-controlled Syrian Military Media quoted governor Beshr al-Sabban as saying that 1,012 people, including 455 gunmen, were the last to leave Barzeh.
Anas a-Dimashqi, an opposition activist based near Damascus, said the fighters and their families will head to the town of Jarablus on the border with Turkey and the rebel-held northwestern province of Idlib. He said those who stay have up to six months to settle their conditions with the government.