Story highlights Three security forces among six attack victims, police say

Gunmen raid police station in Indian state of Punjab

Official calls it a terror attack

New Delhi (CNN) All three terrorists involved in a Monday attack on a police station in the Indian state of Punjab are dead, and the siege has ended, according to a top Punjab police official.

Six victims were killed -- three civilians and three security forces, said Dinkar Gupta.

Earlier, the gunmen fired at a nearby bus stand before storming the police station, which is next to a hospital, said Gupreet Tur, police chief of Gurdaspur district.

Tur described the raid as a terror attack but said it was not immediately clear to which group the attackers belonged.

Sandwiched between two rivers, Gurdaspur is Punjab's northernmost district and is close to Pakistan.

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