"Someone from the mob hurled a grenade towards the police personnel during stone pelting on police station Yaripora. The grenade attack was followed by firing also," the official said.
At least six policemen were injured in the attack, he said, adding condition of one of them is stated to be critical.
Earlier, police officials had said one policeman was killed in the attack. However, as the injured were evacuated from the police station premises, all the six injured cops were found alive.
He said the critically injured cop has been admitted to the 92 Base hospital of the Army here.