The attack took place in Balochistan's Mastung area. — File photo

QUETTA: One person was killed when unknown gunmen opened fire at Nato tankers in Balochistan province’s Mastung area on Wednesday, DawnNews reported.

Four tankers were set ablaze in the attack.

Nato trucks and oil tankers are regularly targeted with arson attacks blamed on insurgents attempting to disrupt two key supply lines that cross western Pakistan bound for foreign troops fighting in neighbouring Afghanistan.