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American-led forces have conducted 21 airstrikes near Kobani, Syria over the last two days in an attempt to slow the advance of Islamic State militants.

One strike hit a modular oil refinery near Deir al-Zor, U.S. Central Command said. Other strikes destroyed two militant staging areas, destroyed or damaged three Islamic State buildings and damaged three other compounds, it said.

The military said there are indications the airstrikes have slowed Islamic State advances in Kobani, but cautioned the situation on the ground remains fluid as militants try to gain territory.