Jammu: The Border Security Force (BSF) troopers on Sunday discovered an underground tunnel on the international border at Regal area in J&K`s Samba district, officials said.

As per the BSF officials, the underground tunnel was discovered by a patrol party and "could have been used for infiltration from across the border".

It is suspected that the four Jaish-e-Mohammad terrorists who were killed in an Army operation on Thursday may have used this tunnel to sneak into the country from Pakistan.

The BSF officials further said that a massive anti-tunnelling operation is being carried out since Friday. The Army and police have also joined the operation, which is still underway.

The security forces had received information about the infiltration of the four terrorists from across the international border in Samba sector.All the four terrorists were killed in an encounter near the Jammu-Srinagar national highway toll while travelling in a Kashmir-bound truck on Thursday.

The security forces had received information about the infiltration of the four terrorists from across the international border in Samba sector.All the four terrorists were killed in an encounter near the Jammu-Srinagar national highway toll while travelling in a Kashmir-bound truck on Thursday.

A huge cache of arms and ammunition including 11 AK series rifle, 29-30 Chinese grenade, three pistols, two cutters, RDX of four-five kg. In addition, remote, mobile phone, dry fruit, Pakistan-made medicines were also recovered from the slain terrorists.

According to police, had come to execute a 'big plan' to disrupt District Development Council polls, slated to be held in eight phases beginning November 28.

Two SOG men of the J&K police were injured in the gunfight, officials said. The injured were identified as Kuldeep Raj (32) of Akhnoor and Mohammad Ishaq Malik (40) of Neel Qasim Banihal Ramban.

Both have been admitted to GMC Jammu with injuries on the neck and their condition is said to be stable.