QUETTA - Three oil tankers carrying fuel for NATO forces deployed in Afghanistan were set on fire in different areas of Balochistan on Monday. According to reports, unidentified people opened indiscriminate fire on a tanker at Aktharabad area, in the outskirts of Quetta, forcing driver to stop the vehicle. The attackers, after sprinkling petrol, torched the tanker. Separately, two armed motorcyclists intercepted another oil tanker passing through the Mangochar area of Kalat district, 150 km southeast of Quetta on National Highway and set it on fire after directing driver and cleaner to leave the site. The trailer was totally damaged. Agencies add: Four gunmen riding two motorbikes opened fire at two NATO oil tankers in the Mangochar area while they were on their way to Afghanistan, local police official M Ismail told AFP. One tanker was partially damaged and the other completely gutted, he said. Unknown armed men set ablaze a trailer carrying goods for NATO forces on National Highway in Khuzdar on Monday. According to local police, the trailer carrying goods for NATO forces was going to Afghanistan from Karachi when the armed men intercepted and set it on fire. The Armed men fled from the scene after committing crime. The Police have registered case and started investigation. There was no claim of responsibility, but the Taliban mounted a series of such attacks this month, exploiting the build-up of convoys caused by the border closure and saying they were avenging US drone strikes.