KABUL, Afghanistan -- NATO forces killed two insurgents who had attacked a police station in northern Afghanistan by hitting their truck with an airstrike as they fled the area, the coalition said Sunday.

Three pickup trucks full of gunmen launched an attack on the main police station in Kunduz province's Aliabad district on Saturday afternoon, said Deputy Provincial Police Chief Abdul Rahman Aqtash.

"They started a gunbattle that lasted for about one and half hours," Aqtash said, with both police reinforcements and NATO air support called in.

One police officer was killed in the fighting, he said. NATO said in a statement that no one was killed or injured in the gunfight. It was not immediately possible to reconcile the discrepancy.

A NATO air team tracked the insurgents as they drove away, and fired on the truck after determining there were no civilians nearby, the statement said. Several other militants were injured. Aqtash said the number killed may have been higher, but he was still confirming figures.