Officials say rebels fighting Indian rule in Kashmir detonated a bomb outside a police station, injuring nine officers.
Local police chief Altaf Khan says the rebels first exploded grenades outside the police station in Sopore town on Wednesday and then detonated a bomb as the policemen came outside. Four of the officers were injured seriously.
No group has claimed responsibility for the attack.
The rebels reject Indian sovereignty over Muslim-majority Kashmir and want independence or a merger with Pakistan, which controls another part of the Himalayan region.
The conflict has killed more than 68,000 people since 1989.