The BSF on Tuesday sighted two high-flying drones along with Punjab's Hussainiwala sector, days after police recovered Pakistani drones used to airdrop arms and ammunition in border areas of the state.
Border Security Force personnel sighted the drone four times on the Pakistani side, while once it was seen almost a kilometre inside the Indian territory, a BSF official said.
While going back, the light and sound of the drone went off and it vanished within no time.
Sources said that the troops have been asked to keep hawk's eye on such developments.
The border guarding force has also started sensitising the residents along the border to immediately inform the police or BSF authorities if they spot anything unusual near the zero lines.
In September, two drones were recovered from border areas of Tarn Taran and Amritsar in Punjab.