A U.S.-backed coalition of rebels in Syria -- including Syrian Kurdish, Arab and Christian groups -- has captured a major dam on the Euphrates River in the north from ISIS.

The coalition, known as Syria Democratic Forces, seized the Tishrin Dam on Saturday as part of its offensive aimed at cutting supply lines between ISIS strongholds in northern Syria.

The Tishrin Dam supplies much off northern Syria with electricity.

An SDF spokesman told AP earlier this week that his forces are also trying to cut the supply lines between ISIS's de-facto capital of Raqqa and the group's stronghold of Manbij in northern Syria.

The SDF, dominated by the Kurdish militia in Syria known as YPG, or People's Protection Units, has become a main force in fighting ISIS.