The deceased official was identified as Pratap Singh, a 1996-batch inspector posted at IGI Airport, police said.
Around 1 PM, passer-by called up the police and reported about a parked car whose driver was apparently unconscious. A police team rushed to the spot immediately and pulled out Singh after breaking a window, DCP (East) B S Gurjar said.
He was rushed to a hospital, where doctors declared him brought dead. His body was sent for a post-mortem examination and the report obtained today suggested that he died of a cardiac arrest, Gurjar added.