KARACHI - At least three Kandahar-bound trucks, carrying Nato supplies, were ambushed at Northern Bypass here on Thursday, causing injuries to three people. Two unidentified militants riding a motorbike intercepted the trucks, carrying NATO supplies, hurled hand-grenade and fired volley of bullets at them. As a result, three people identified as Shanakhat Imran, Zar Habib and Ghaniur Rehman sustained bullet wounds while the culprits successfully made their way off the scene. The incident occurred on Hub River Road near Dalda More in the limits of the SITE-B Police, when three prime-mover vehicles, carrying logistic support goods for NATO forces were attacked by two armed militants, said SITE Town SP Asad Raza. He said the two unidentified suspects first threw a hand-grenade on the trucks and then opened indiscriminate fire. The trawlers caught fire following the incident. Fire tenders were called in while police contingents cordoned off the area. The injured, hailing from Khyber Agency, were taken to a private hospital. Police have registered a case against unknown assailants, the SP said. It is to be mentioned here that intelligence agencies had already warned of possible attacks on NATO supplies, moving from the area where the incident took place. In the report, the agencies had also mentioned about the movement of suspicious elements in the area. A senior Police officer, requesting not be named, said that it seemed that the militants had finally broken the lull and made their way through the City to carry out their subversive activities. Earlier, activists of the defunct Tehreek-e-Taliban Pakistan had warned and dropped handbill at truck stand, situated at Shireen Jinnah Colony, warning all the transporters not to carry supplies for NATO forces or geet ready for the consequences.