At least five security personnel were martyred in an attack on a security check post in Khyber Agency on Saturday-Sunday night. In retaliatory action by the security forces 10 extremists were also killed. According to sources unknown miscreants attacked a joint check post of Khasadar Force and Aman Lashkar, located in Akakhel area of tehsil Bara. Four members of Peace Committee and Khasadar personnel were killed in the attack. The security forces retaliated the attack with heavy fire killing at least 10 extremists and forcing others to flee.