A 30-metre-long tunnel from Pakistan to the Indian side was on Thursday detected by the Border Security Force on the international border in the RS Pura sector of Jammu district.
"We have detected a well-constructed tunnel on International Border in RS Pura sector of Jammu district today," a senior BSF officer said.
This is the fourth tunnel unearthed by the BSF in the region since 2012.
"We were carrying out our regular clearing operations, done monthly, when we found a well-constructed tunnel," he said, adding that it was being dug out with JCB.
"We were suspecting some activities across the border. There were late night movements. People used to come late in night to the post across".
The tunnel is approximately 10 feet below the ground and has a length of 30 metres from their end to this side, he said.
"But it was blocked on our side. It was dead end. It had no exit as they could not complete it further. It came close to the border fencing," the officer said.
"One person can sit and easily move inside the tunnel which has came up in the vicinity of Allah-Mai-Di-Kothi BoP of ours from Pakistan Post of Afzal, he said, adding that a probe was on.
Earlier, BSF had detected a 400-metre long cross-border tunnel along the International Border in July 2012 in Samba sector.
In May 2014, it found a caved-in portion of the tunnel in Chillyari border belt in Samba district, which was found 23 metres inside the Indian territory.
Another tunnel was discovered in August 2014, which was approximately 130 to 150 metres in length along the Line of Control and originated on the Pakistan side, near a forward post along Indo-Pak border in Jammu region's sensitive Pallanwala sector.