US-backed fighters in Syria were battling to oust ISIS from its eastern holdout of Hajin. (File)
The ISIS has killed 41 US-backed fighters in Syria battling to oust the jihadists from their eastern holdout of Hajin on the Iraqi border, a war monitor said Saturday.
ISIS late Friday used suicide bombers as part of a counter-attack against the Syrian Democratic Forces, backed by the US-led coalition against the jihadists, said the Britain-based Syrian Observatory for Human rights.
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