PESHAWAR- Unknown terrorists attacked a residential colony with hand grenades, but the bid was foiled and no loss was reported. Police said that unknown miscreants threw a hand grenade at a house in Khan Mast Colony of Peshawar. However, the hand grenade did not explode and later the bomb disposal squad (BDS) was called in which defused the bomb. Police said that two attackers came on a motorcycle and threw hand grenade. One of them was injured in firing of private security guard of the colony, but both managed to escape after the incident. A case has been registered against the assailants and police have started search for them.