A Kurdish official and an activist group say the U.S.-led coalition is pounding positions of the Islamic State group in the Syrian border town of Kobani in some of the most intense airstrikes so far.

But the Britain-based Syrian Observatory for Human Rights says that despite airstrikes overnight and into Thursday morning, the Islamic State fighters captured a police station in the east of the town and now control a third of Kobani.

Idriss Nassan, an official with the town's Kurdish government, says the station was taken but that it was later destroyed in a strike.

He says the Kurdish fighters managed to regain several other town areas on Thursday.

The Islamic State group's onslaught on Kobani, which started in mid-September, has forced some 200,000 people to flee the area.