Four troopers of the Central Reserve Police Force were seriously injured in a powerful blast in north Kashmir's Sopore town on Thursday afternoon.
Militants hurled a grenade at the battalion headquarters of the CRPF, located in a hotel building near the main bus stand, said a spokesperson of the police.
"The grenade exploded, injuring four CRPF jawans. All the injured were shifted to the hospital for treatment. The police have registered a case and investigation is going on," the spokesman said.
The explosion triggered panic in the town, with people running for cover. The area around the hotel was searched by security forces.
No group has yet claimed responsibility for the blast.