At least 15 people, including members of an anti-Taliban militia, were killed today in a clash between security forces and heavily-armed militants in the restive Khyber tribal region of northwest Pakistan. The clash began when militants attacked a check post jointly manned by security forces and volunteers of an anti-Taliban militia in Bara area of Khyber tribal agency.TV channels reported, the militants used heavy weapons, including rocket-propelled grenades, to target the check post. Five members of the pro-government militia were killed instantly and several others were injured.