Air strikes have targeted oil installations and other facilities in territory under the control of Islamic State (IS) militants in eastern Syria for a second consecutive day, activists have said.
The Britain-based Syrian Observatory for Human Rights said the attacks overnight and early today are believed to have been carried out by the US-led coalition against the extremist group.
The Observatory said the strikes hit at least two oil-producing areas in Deir el-Zour province. It said air raids also targeted IS's headquarters in the town of Mayadeen.
Another activist collective, the Local Co-ordination Committees, also reported four strikes on Mayadeen which it said were carried out by the coalition.