Suspected Taliban fighters set fire to 18 container trucks carrying military supplies for Western forces in neighbouring Afghanistan where U.S.-led forces invaded in 2001 in the Pakistani border town of Chaman, police said on Monday.
Some 300 trucks were parked near the border crossing in the country's southwest, as the border had been closed by Pakistani authorities since Friday in a row with their Afghan counterparts over the checking of trucks coming from Afghanistan.
"The attackers probably had planted explosives under one of the oil tankers which went off, setting others on fire," Abdul Rauf, a senior border police official, told Reuters. "Eighteen trucks have completely been destroyed."
Witnesses, however, said the fighters lobbed a grenade onto the trucks, setting them on fire.
"They came on motorcycles. They first opened fire with guns, then threw a rocket-propelled grenade towards our vehicles and ran away," Akhtar Mohammad Niazi, a driver, told Reuters.
Rauf said the authorities had reopened the border crossing after the incident, which took place late on Sunday.
Chaman is one of the two Pakistani border crossings used for the transport of food and fuel supplies for Western troops to boost Afghanistan occupation.
The U.S. military has used Pakistan to send 75 percent of supplies for the Afghan invasion, including 40 percent of the fuel for its troops, the U.S. Defense Department says.
Most of these supplies are trucked through the Khyber Pass, to the northwest, to eastern Afghanistan. Taliban has kept attacks on military supply convoys since last year to curb invasion of foreign forces in Asian country.
In the past, the route through Chaman, in Baluchistan province, has been largely free of attacks, at least on the Pakistani side.
The attacks, especially in the Khyber region have forced NATO to look for alternative routes, including through Central Asia into northern Afghanistan.