A man was killed and another injured as a result of hand grenade attack here in Quetta on Monday, police said. According to the details, some unidentified miscreants attacked on laborers working on tube well in city area of Keli Aalmu, killing a man, Suhaib and injuring another. Police arrived on the spot soon afterwords and shifted the body and the injured man to hospital. It should be mentioned here that miscreants managed to escape after attack. Police said laborers were sleeping in their room, where the culprits hurled hand grenade and fled away. The deceased belonged to Punjab area of Sadiqabad.