Following the detection of the tunnel, a general inspection across the border area was progressing, Antony told reporters on the sidelines of a function in Thiruvananthapuram.
"I do not want to react more on the matter as a general inspection on the border areas is on," Antony said.
The tunnel, which was apparently dug for infiltration and smuggling, was detected on July 28 after an area caved-in in a straight line at two-three places due to rains near the border fencing near Chillayari Border Out Post (BoP) of BSF along the International Border in Samba sector.