QUETTA - Two oil tankers carrying Nato supplies were destroyed in the fire set by unidentified armed men in Mithri area of Bolan district on Saturday. The oil tankers were on their way to Afghanistan when unknown armed men attacked. on the tankers on National Highway near Mithri area of Bolan district. As a result, oil tankers caught fire as a result of oil spill and were destroyed completely. The attackers managed to escape after committing the terrorist act. No one claimed responsibility for the attack.