BEIRUT (AP) — Two Syrian monitoring groups are reporting that the U.S.-led coalition has targeted oil facilities run by the Islamic State group in eastern Syria.

The airstrikes came hours after British Parliament voted to authorize air attacks against IS targets in Syria.

British warplanes carried out airstrikes in Syria early Thursday, taking off from the Mediterranean island of Cyprus.

The Britain-based Syrian Observatory for Human Rights said warplanes struck areas near the oil fields of Omar, Tanak and Jafra in the eastern province of Deir el-Zour.

Another group that tracks Syria’s war, the Local Coordination Committees, said warplanes struck areas near the Milh and Omar oil fields in Deir el-Zour.

The Omar field is one of Syria’s largest.

The monitoring groups could not confirm if the airstrikes were carried out by Britain.