Two policemen and two Taliban militants were killed in a rocket attack and subsequent clashes early on Friday in a northwestern Pakistani town, police said.
Militants fired rockets at Purdalkhel police station in the garrison town of Bannu, a base for Pakistani military hunting Al-Qaeda-linked Taliban militants in the restive tribal belt bordering Afghanistan.
"Two policemen embraced martyrdom and one was injured after Taliban fired rockets at our police station," local police station chief Taj Mohammad Khan told AFP.
"Two militants were also killed when police retaliated," he added.
On Thursday militants struck another police station in Bannu, killing one policeman and injuring three others.
Bannu has seen several bombings and rocket attacks blamed on Taliban militants.
Pakistan's tribal belt became a safe haven for hundreds of extremists who fled Afghanistan after the US-led toppling of the hardline Taliban regime in late 2001.