A string of bomb attacks on Sunday near a Shiite shrine south of Damascus killed 120 people, in the deadliest attack since Syria's war erupted in 2011, a monitor said.

At least 90 civilians were among those killed when suicide attacks claimed by the Islamic State jihadist group ripped through the area of the Sayyida Zeinab shrine, the Syrian Observatory for Human Rights said. The rest of the dead were from pro-regime security forces.