The firefight lasted several hours—APP file photo.

KURRAM: Pakistani troops assaulted militant strongholds in the northwestern tribal region of Kurram on Friday around midnight, killing 35 militants and wounding 10 more, security officials said.

Four soldiers were also killed in the firefight, which lasted several hours. Militant sources confirmed the clashes and casualties but disputed the government's death toll.

There was no independent confirmation of the battle.