The incident took place two days ago when Amanpreet Singh alias Binny shot at his neighbour Harbhajan Singh, who walked with the help of crutches and was about to undergo a hip-replacement surgery, said police.
Amanpreet and Harbhajan had had a round of argument two days before the incident after a guest in the latter's residence accidentally brushed past a car parked outside the former's house in west Delhi's Vishnu Garden area, said police.
The incident which took place on Sunday was caught in CCTV cameras, the footage now in possession of police.
Harbhajan was rushed to a hospital, where his condition was reported to be out of danger. However, Amanpreet fled with his family after the incident and a police team is looking for him, police added.