U.S-led forces which are bombing Islamic State militants in Syria killed ten civilians in two recent air strikes, a group monitoring the violence said on Saturday. The Syrian Observatory for Human Rights said seven civilians were killed when an air strike hit a gas plant near the town of al-Khasham is the eastern Deir al-Zor province on Friday, and three civilians were killed in an air strike on Thursday night in the **rth east province of al-Hassakah. Reuters can**t independently confirm the reports due to security restrictions. According to the United Nations, close to 200,000 people have been killed in Syria's three-year civil war.