Srinagar, Sep 8 - A policeman was injured in a powerful hand grenade explosion in Jammu and Kashmir's Baramulla town Tuesday.

A police officer said guerrillas lobbed a grenade at the official residence of district and sessions judge Baramulla which exploded after hitting the bunker manned by police. Baramulla is 54 km from the state's summer capital Srinagar.

'One cop was injured in the blast and was treated at the local hospital,' said the officer.