A car bomb killed at least four people and wounded 10 on Saturday, when it hit a police bus in Indian Kashmir's main city, police said. The explosion, the deadliest in recent months, shook buildings around Central Jail, the main prison in Srinagar, Kashmir's summer capital. Three police and a woman were killed. It was a car bomb and it hit a police bus, Mohammad Amin, a police official said. Security forces cordoned off the area after the incident and the injured were shifter to the nearby hospital. Situation of some of the injured was stated to be critical. No militant group has claimed responsibility.