An attack by Syrian government forces on the rebel-held area of Idlib in northwestern Syria killed at least 15 and wounded several at a displaced persons camp on Wednesday, rescue workers said.
Israel said its aircraft struck dozens of Iranian and Syrian military targets in Syria on Wednesday in retaliation for rockets fired towards Israel a day earlier.
Turkey's Interior Minister said on Wednesday that around 100,000 Syrians living without approval in Istanbul had left it since early July, when the government set a deadline for Syrians not registered in the city to leave for other provinces.
Islamic State has exploited Turkey's incursion into northeastern Syria and the drawdown of U.S. troops from the region, according to a report published on Tuesday by the Pentagon's Inspector General, adding that the militant group will likely have the "time and space" to target the West.
Turkey's defence ministry said on Tuesday Kurdish YPG militia had killed three people and wounded eight in a missile attack on a school in the Tel Abyad region of northern Syria which they were meant to have withdrawn from under a ceasefire agreement.
Russia said on Tuesday it was bewildered by a Turkish pledge to conduct a new military operation in northern Syria if the area was not cleared of people Ankara calls terrorists, warning that any such move would damage efforts to stabilise the region.
The United States on Monday imposed sanctions on four companies and two people operating in Syria, Turkey, the Gulf and Europe for providing financial and logistical support to Islamic State.
Turkey's foreign minister said Ankara would launch a new military operation in northeast Syria if the area was not cleared of what he called terrorists, state-owned Anadolu agency reported on Monday.
The Turkish Defence Ministry said on Saturday that a car bomb attack by Syrian Kurdish fighters killed 10 people and wounded more than 15 in the northern Syrian border town of Al-Bab, which Turkish forces seized in a 2016 offensive.
Turkey has sent more than 6,000 Syrian migrants in Istanbul to temporary housing centres in other provinces since early July, the local governor's office said on Friday, two weeks after a deadline for Syrians not registered in the city to leave.