QUETTA: Tribesmen continued to block the southwestern supply route for NATO forces in Afghanistan at Chaman to protest the killing of one of their members in a raid by Pakistan's anti-narcotics force.

Trucks and other vehicles were blocking the main Quetta-Chaman highway, forcing about 100 trucks carrying NATO supplies to park, according to the region's deputy police superintendent, Mohammad Qasim.

No damage or injuries have been reported in the protest, which started Sunday.

Tribal elder Abdul Qahar Wadan said the tribesmen were prepared to keep up the blockade until their demands were met.

'We will not let anybody open the highway until a judicial inquiry is ordered into the raid and a criminal case is registered against the officials involved in it,' Wadan told The Associated Press.

Most NATO supplies travel through the famed Khyber Pass to the north, where they have been attacked by Taliban militants, although a smaller number get to Afghanistan by a second land crossing at Chaman.