Gurdaspur, July 27 (ANI): In an early morning attack, gunmen in Army uniform travelling in Maruti 800 car on Monday morning attacked Dinanagar police station in Punjab's Gurdaspur. At least three people were killed and four others injured in the suspected terror attack in Gurdaspur district. According to reports, the attackers, three to four in number first attacked a state roadways bus and then entered the police station. The white Maruti car is still stationed at the spot with many bullet marks. The gun battle between police and suspected terrorists ensued after the latter opened fire on the police station and a bus in Dina Nagar town. Four terrorists are holed up inside the police station in Dinanagar. Firing is still on. According to reports, the gunmen are heavily armed and are carrying automatic weapons with them. So far, no group has taken responsibility of the attack. Police has increased the security and the area has been cordon off. Meanwhile, live bombs have also been recovered on Pathankot-Amritsar railway track