BEIRUT (AP) — U.S-allied forces said Sunday they have captured Syria's largest oil field from the Islamic State group. The Kurdish-led Syrian Democratic Forces, who are in a race with Russian-backed Syrian troops to seize parts of the oil-rich Deir el-Zour province, said they are in full control of the Al-Omar field. The SDF has already driven IS from Deir el-Zour's main natural gas field and smaller oil fields.