At least 20 Nato oil tankers have been set ablaze when some unidentified miscreants opened indiscriminate firing on the tankers here in Naseerabad on Saturday while one driver got serious injuries and other is missing. According to eyewitnesses, four armed men opened indiscriminate fire on the 20 Nato oil tankers in Naseerabad near Dera Murad Jamali and set to ablaze the oil tankers injuring the driver. Soon after torching the tankers the miscreants succeeded to escape from the scene. The fire engulfed the adjacent hotel and market. After the incident the Levies Force closed national highway from Sukkar to Quetta. The Levies Force has cordoned off the area and started search operation while only one fire Brigade reached at the site to control the fire.