BSF troops are using more dozers and men to find out origin of the tunnel towards the Indo-Pak border.
"The operation is going on in full swing. More dozers and men are working uncover the tunnel into India from Pakistan. It will take some time to dug the entire tunnel," a senior BSF officer told PTI.
A team of senior officers from New Delhi will visit the spot to have a look at the cross-border tunnel today.
"We have not raised the issue of detection of tunnel with our counterparts - Pakistan Rangers so far," he said adding, let this operation complete.
Authorities had yesterday detected the 400-meter tunnel into India from Pakistan along Indo-Pak Border in Samba district.
The tunnel was detected after an area caved in a straight line at two three places due to rains near Chillayari Border Out Post (BoP) of BSF along International Border (IB) in Samba sector.
The secret tunnel was discovered accidentally by a farmer of Chachwal village.