DAMASCUS, Syria (AP) — The Latest on the Syrian conflict (all times local): 3:15 p.m. The main U.S-backed Syrian force fighting the Islamic State group says a Russian airstrike on a gas field it recently captured from the extremists killed one of its fighters. A statement issued by the Syrian Democratic Forces said two other fighters were wounded in Monday's strike in the eastern province of Deir el-Zour. It says the attack occurred on the Conoco gas field, which the SDF captured from IS on Saturday. On Sept.