US-led coalition hits Islamic State group in 4 provinces across northern and eastern Syria

Turkish Kurds watch clashes between Syrian Kurdish fighters and militants of the Islamic State close to Turkey-Syria border near Suruc, Turkey, Sunday, Sept. 28, 2014. (AP Photo) (The Associated Press)

Turkish Kurds watch clashes between Syrian Kurdish fighters and militants of the Islamic State close to Turkey-Syria border near Suruc, Turkey, Sunday, Sept. 28, 2014. (AP Photo) (The Associated Press)

Activists say the U.S.-led coalition has carried out several airstrikes targeting Islamic State group positions in northern and eastern Syria.

The Britain-based Syrian Observatory for Human Rights says the air raids overnight took place in four provinces: Aleppo, Raqqa, Hassakeh and Deir el-Zour. The entrance to Syria's largest gas plant, Conoco in Deir el-Zour, was among the targets.

The Observatory says there were casualties in the airstrikes, but that it has no concrete figures.

A resident on the Turkish side of the Syria-Turkey frontier says strikes Monday morning also struck the Islamic State-controlled town of Tel Abyad. The town is home to a border crossing.

The resident, Mehmet Ozer, says the strikes hit an abandoned military base and an empty school.