Search operations were in their final phase as security forces moved to secure every inch of the Pathankot air force base on Monday. Occasional sound of firing and a blast was heard from inside as the counter offensive by security forces neared 60 hours.
"We have eliminated four terrorists and operation to eliminate two more terrorists possibly is in the final stage," National Security Guards (NSG) Inspector General Major General Dushant Singh told the media.
"The operation will continue till all the personnel, assets and structure are physically combed. So it is likely to take a long time," he said.
"These terrorists are holed up in a double-storeyed building which is a living accommodation of the air force personnel. The operations are on to clear this building from the terrorists," said Brigadier Anupinder Singh.
A search operation was also on in nearby villages for possible terrorists. There were reports of raids by security agencies at some other places in Punjab, Haryana and Chandigarh.
Saturday's audacious terror attack started at 3.30 a.m. Four terrorists were killed on Saturday. The security forces have lost seven personnel.
The army, NSG and IAF officers said the operation would continue till the combing of the air base was completed.
The four terrorists were killed by security forces on Saturday after a 15-hour long gunfight in which the NSG, Indian Army and IAF commandos were involved, assisted by IAF helicopters.