The terrorists opened fire at the post located in the Thall area of Hangu district of the province late Tuesday night, the military's media wing Inter-Services Public Relations (ISPR) said in the statement.

"Troops initiated a prompt response and effectively engaged the terrorists," said the statement, adding that during an exchange of fire, one soldier of the Pakistani army was killed.

The army has carried out a search operation to eliminate any terrorists found in the area, it added.