A Pakistani government official says five NATO oil tankers burned after an explosion at the Afghan border.
Tahir Khan says the Tuesday explosion ripped through a parking area at the Torkham border crossing, where the tankers go through customs before crossing into neighboring Afghanistan.
He said he did not know who was responsible or what caused the explosion. Islamist militants usually attack the tankers elsewhere in Pakistan.
Most supplies for NATO and its allied U.S. forces pass through two routes in the country.