State Police arrested a man who provided logistical support to some suspects who fired an RPG or RPG at intelligence headquarters in Mohali in Punjab.
The latest arrest comes after state police said they have arrested two more suspects from across the state.
Police said they are working on putting together how the entire plot is stitched up and will soon provide details to the public.
The latest suspect arrested has been identified as Nishan Singh, a resident of Faridkot. He is being questioned.
Police said he provided logistical support to the people who attacked the intelligence wing building.
Police Director General VK Bhawra said yesterday that they have some leads and the case will be resolved soon.
A statement issued by Mohali Police said, “A number of suspects have been arrested and questioned. The grenade launcher used in the attack has been found by the police, and all leads developed in the case are being closely followed up.”
An RPG was launched on the third floor of the heavily guarded building in Sector 77 in Mohali at 7:45 pm on Monday, after which an alarm was sounded in Punjab.
The assistant inspector said he heard an explosion on the third floor of the building and when he went there, he saw smoke rising from the room. He said that a shell, after hitting a wall and shattering window panes, hit the ceiling before falling onto a chair.
Punjab Chief Minister Bhagwant Mann held a meeting with senior police officers over the attack.
Mann said no one would be allowed to disturb the peaceful atmosphere in Punjab. He said some forces are constantly trying to stir up trouble across the state.
The first minister said, “Whoever tries to spoil the atmosphere of Punjab will not be excluded, and will be punished with the harshest punishments, which will be remembered by future generations.”