The main gas supply line to Narsingdi was damaged during construction work on a drain, according to Titas Gas authorities
Deputy Director Jalal Uddin Ahmed began questioning Mahi at the graft watchdog's headquarters in Segunbagicha around 10:30am on Sunday, said ACC spokesperson Pranab Kumar Bhattacharya.
Ashfa Haque, the wife of Mahi, did not appear at the ACC office despite facing the same charges.
The couple was asked to appear before the commission’s headquarters on Aug 7 in two separate notices issued on Aug 4.
Director Jalal Uddin started investigating the allegations against the couple in June.
Mahi, the MP from Munshiganj-1, has not issued any statement on the issue.