PHILADELPHIA:  At least six police officials have been shot at by a gunman in Philadelphia, America. The injured police officials are undergoing treatment at a local hospital.

The gunman attacked the police officials when they came to the house to serve a state narcotics warrant, said authorities.

The assailant is still inside the house where the standoff is taking place.  Police are currently trying to communicate with the attacker.

The cause behind the attack and the whereabouts of the attacker are yet to disclosed.

(Agencies)