Kandahar, Afghanistan: Unknown gunmen kidnapped a Pakistani road construction engineer in the southern city of Kandahar on Saturday, the provincial police chief said.

"This morning, unknown gunmen attacked a car carrying a Pakistani road construction engineer and his driver in the city of Kandahar. They wounded the driver and left him, taking the car and the engineer with them," Provincial Police Chief Sayed Aqa Saqib told reporters.

Another car belonging to the same construction company hit a roadside mine on Saturday while driving towards Kandahar city. The mine exploded and killed one Afghan in the car and wounded another, he said.

It was not immediately clear who was responsible for the attacks.

In another incident, Afghan and coalition forces killed several militants on Friday in the eastern province of Kapisa, the US military said on Saturday.

The joint forces were carrying out a search operation when they came under fire from several militants and responded with small arms fire and airstrikes killing several of the militants and detaining three, it said.