"Amit was arrested under section 306 of the IPC (abetment to suicide) in connection with the suicide committed by Anjali at his residence here on September 11," Additional Superintendent of Police, Rajesh Chandel told PTI.
"He will be produced in a court soon," the ASP said.
Earlier today, the post-mortem report of Anjali Gupta, who was found hanging from the ceiling fan in the house of Amit, said she died of asphyxiation.
Her family members alleged Anjali was having "live-in" relationship with Amit since 2001 and that continued even after she was court-martialled in 2006, the ASP said.
They claimed Amit had promised to marry her but as it did not materialise, she committed suicide.
However, Amit told police that he only knew her as his subordinate and was not having any other relationship with her, Chandel said.
Anjali`s last rites were performed yesterday at the Subhash Nagar cremation ground.
Meanwhile, Indian Air Force has also initiated an inquiry into the matter.