India, March 19 -- In an alarming incident, a section of the underground tunnel of the Aqua Line (Metro Line 3) was damaged on March 5 after an unauthorised borewell drilling operation near Metro Cinema in south Mumbai, prompting police action days later. Metro Line 3 currently serves around 1.8 lakh passengers daily, including nearly 60,000 commuters between Cuffe Parade and CSMT.

According to the Mumbai Metro Rail Corporation (MMRC), the breach occurred when Shree Chandrama Water Supply Company was drilling a borewell without obtaining mandatory permission from the authority. The drill is believed to have pierced part of the tunnel, located about 18 metres below ground near the Chhatrapati Shivaji Maharaj Terminus (CSMT) metro station....