One soldier died on the spot and the second one succumbed to his injuries in a hospital, said a statement issued by Frontier Constabulary paramilitary force.
The injured soldier was taken to a nearby hospital, the statement said. The landmine exploded near a check post of Thall Scouts in lower Kurram agency, bordering Afghanistan.
Security forces have cardoned off the entire area and started combing operation. They also targeted the hideout of the militants after the blast.