PESHAWAR, Pakistan — A Pakistani government official says militants have beheaded three members of an anti-Taliban militia in the country's northwest.

Iqbal Khan says the militants also abducted three other members of the militia on Monday in the Khyber tribal area.

Khan, a government administrator, said on Tuesday that dozens of militants took part in the attack in the Bara area of Khyber. He says authorities are investigating which militant group was behind the attack.

The government has long encouraged local tribesmen to set up militias to fight against the Taliban and other militant groups. But many of the militiamen have been killed in attacks.

The attack in Bara took place as Pakistan's major political parties passed a resolution in support of holding peace talks with militants fighting in the country.