A vehicle carrying eight militants was destroyed as an improvised explosive device went off in the central Kurram area, according to sources.
Meanwhile, heavy artillery firing by security forces left six militants dead and 10 injured in the Chinark area.
Three militant hideouts were also destroyed in the attack.
Militants reportedly fled to Kurram from Orakzai Agency amid military operation.
Security forces have been engaged in an operation in Kurram Agency for the last 10 months.