Airstrikes hit oil refineries near Syria's border with Turkey early Sunday in the ongoing offensive against Islamic State militants.
A U.S.-led military coalition has targeted similar facilities in the last week to stop the flow of millions of dollars in daily oil production revenue to the group, which has taken over parts of Syria and Iraq in recent months.
The U.S. Defense Department said coalition warplanes on Saturday struck a northern Syrian town that has been under militant siege for nearly two weeks.
Activists and Kurdish officials said Islamic State fighters fired rockets into the town, known both as Kobane and Ain al-Arab. At least 12 people were reported wounded in the rocket attacks, while no immediate casualty estimates were released for the coalition strikes.
The Islamic State siege at Kobane has sent 160,000 refugees streaming into Turkey, while hundreds of Kurdish fighters inside Turkey have crossed into the Syrian town to defend it.