Chandigarh, June 26 -- A special investigation team (SIT) probing a high-profile drug case has uncovered a massive money laundering operation involving over Rs.540 crore, allegedly facilitated by former Punjab minister Bikram Singh Majithia.

The Punjab vigilance bureau (VB) on Wednesday arrested Majithia under Prevention of Corruption Act after raiding his residence in Amritsar on Wednesday morning.

A detailed seven-page first information report (FIR), registered in VB (flying squad) police station, Mohali, by AIG Swarandeep Singh is based on the SIT's investigation and outlines an extensive money trail linking shell companies, suspicious foreign transactions and unexplained asset accumulation.

The FIR was registered against Majithia u...