Unidentified men shot a police officer in South Delhi's Jaitpur area on Tuesday night.
Head constable Ram Avatar, posted at the Ambedkar Nagar police station, returned home after work at around 8 pm. Later that night, he left home and was shot by unidentified persons.
Mr Avatar, who had joined the force in 2003, was rushed to a nearby hospital, where he was declared brought dead.
The police have started an investigation to catch the culprits.