An alert was sounded in Parliament and high security was put in place following the terror attack in Punjab's Gurdaspur district early Monday morning. 

At least eight people, including three civilians and five policemen, were killed when suspected terrorists, disguised as Army officials, opened indiscriminate fire on a passenger bus and Dinanagar police station at around 5:30 am.

The encounter between the assailants and the security forces, including Indian Army, National Security Guard and Punjab Police Commandos, lasted for nearly 12 hours. All the three terrorists were shot dead by the evening.

The security forces had also recovered nearly five live bombs on the Pathankot-Amritsar railway track. The bomb squad has defused the bombs.

As the area attacked by the suspected terrorists is close to the Jammu & Kashmir border, an alert was sounded in the state. Security was also beefed up in Jammu & Kashmir and BSF soldiers along the western border of the LoC have been asked to keep a strict vigil.

Some leaders had claimed the attack to be the handiwork of Khalistani and J&K militants, but the Intelligence Bureau has said the terrorists came from Narowal in Pakistan.

Prime Minister Narendra Modi held a high level meeting in Parliament with union ministers Manohar Parrikar, Arun Jaitley and Venkaiah Naidu to take stock of the situation.