Mumbai : Former Maharashtra Anti-Terrorism Squad chief and Indian Police Service (IPS) officer Himanshu Roy committed suicide today.

Roy, who was serving as the Additional Director General of Police in Maharashtra, shot himself with his service revolver at his residence in south Mumbai.

He was rushed to the nearby Bombay Hospital in Marine Lines where he was declared dead.

A doctor from the Bombay Hospital confirmed Roy's death and said that the police officer was 'brought dead'. Roy's post-mortem is expected to take place shortly.

Roy was reportedly suffering from cancer.

A 1988 batch IPS officer, Roy served as the joint commissioner, crime, of the Mumbai Police from 2010 to 2014 and during this period Roy led the investigation into the IPL betting scandal and the murders of Laila Khan and five of her relatives at the family's Igatpuri house.

Roy was instrumental in the 2013 IPL spot-fixing investigation and other high-profile crime cases such as the firing on Dawood's brother Iqbal Kaskar's driver Arif, and the murders of journalist J Dey's murder, Vijay Palande, and Laila Khan.

A 'Bombay' boy, Roy was an ex-student of Campion and St Xavier's College, Mumbai. His father was a well known Colaba doctor