France and Turkey have said that air strikes on hospitals in northern Syria constitute war crimes.
The man believed to be Hezbollah's most senior military commander in Syria's war is killed in Damascus.
Sweden expects to expel up to 80,000 asylum-seekers whose applications have been rejected, its interior minister was quoted as saying.
Vladimir Putin has said Russia is using "far from everything we are capable of" in its military operations in Syria.
Sweden announces the introduction of temporary border checks to control the flow of migrants into the country.
Germany is to restrict the number of entry points for migrants arriving via Austria, in a bid to control the flow as thousands cross into Bavaria daily.
The US is intensifying diplomatic efforts to end the "hell" of Syria's civil war even as it increases support for moderate rebels, US Secretary of State John Kerry has said.
Iranian Foreign Minister Mohammad Javad Zarif will attend multilateral talks on finding a political solution to the conflict in Syria in Vienna this week, a government spokeswoman has said.
The Islamic State jihadist group executes three people in Syria's ancient city of Palmyra by binding them to three historic columns and blowing them up, a monitoring group said.
Syria's ally Russia says there should be talks between the Syrian government and the "full spectrum" of opposition.