Punjab Terror Attack: IB suspects 4 terror groups

Even as the security battle the militants holed up in the police station at Gurdaspur, there is still no confirmation on who exactly is behind this attack. Intelligence Bureau officials tell that the terrorists had come all the way from Pakistan and the attack was an ISI sanctioned one. The Babbar Khalsa International, Khalistan Zindabad Force, Sikh Youth Federation and the Khalistan Commando Force are considered to be the most active. There was a specific watch being kept on the activities of these groups and the security agencies had said that they would be looking to revive militancy in Punjab.