ITANAGAR, AUGUST 28 (PAIGAM-E-JAGAT)- Three army personnel were killed and several others injured when a truck fell into a deep gorge in Upper Subansiri district of Arunachal Pradesh. Police said the accident took place on the 'Trans Arunachal' highway near Tapi village at around 6 am on Tuesday. According to army sources, the martyrs have been identified as Hauldar Nakhat Singh, Naik Mukesh Kumar and 'Grenadier' ??Ashish Kumar. The injured have been admitted to the hospital.