Militants early Friday beheaded three security guards at a NATO truck terminal and damaged 10 oil tankers in a restive Pakistani tribal area bordering Afghanistan, officials said. The murders took place at the NATO supply vehicle hub in Landi Kotal, a town in the restive Khyber tribal district where the bulk of supplies destined for foreign troops in Afghanistan pass through. "Early Friday we found the beheaded bodies of three security guards from the NATO trucking terminal," tribal administration official Iqbal Khan Khattak told AFP. "It is the work of the militants," Khattak replied when asked who could be behind the killings, alluding to numerous attacks that have targeted workers employed in re-supplying foreign forces based in Afghanistan.