Coalition airstrikes hit the large Koniko gas plant in Deir Izzour, which also houses an Islamic State prison; granaries in the IS-held city of Manbej in Aleppo; three local oil refineries and a plastics factory in Raqqah; and in Markadah in Hasakah. About 1,500 Kurdish fighters have joined the YPG in recent days to battle IS in Aleppo. The Al Nusrah Front and the Islamic Front clashed with regime forces in Aleppo, Quneitra, and Reef Dimashq. Al Nusrah’s emir threatened coalition countries with retaliation for the airstrikes in Syria and warned Syrian rebel groups not to cooperate with the coalition.