An air strike on Syrian army positions in eastern Syria overnight killed at least 12 pro-Assad regime fighters, the Syrian Observatory for Human Rights said Thursday.

The Britain-based monitoring group said the strike was carried out by the U.S.-led coalition in an area south of Albu Kamal which has repeatedly been attacked by the Daesh terrorist group.

Syria's state news agency SANA reported earlier Thursday that several government military posts, located between the Syrian desert and the Iraqi border, were hit by U.S.-led airstrikes resulting in only material damage.

A Syrian source close to the regime, meanwhile, said the bombardment struck bases manned by the Iranian Revolutionary Guards allied with the Assad regime.