Syrian troops have seized the country's largest oil field as well as a gas field after fighting US-backed Kurdish-led forces. The loss of the Omar oil field to the east of the Euphrates River was a major blow to the group as it provided a key source of revenue. The Syrian army also captured the Conoco gas ‌field in the eastern Deir Zor province, as part of an advance into areas of northeast Syria controlled by the historically American-supported ​Syrian Democratic Forces (SDF). Syrian