New Delhi, April 6 -- A 50-year-old man was killed and at least four people were injured after a continuing animosity between two families living in the same neighbourhood at Shakurpur in northwest Delhi erupted into a clash, police said on Sunday. Three people have been detained in the incident.

Police identified the deceased as Rajkumar Gupta, a grocery shop owner. His son, Sumit Gupta (25), and brother, Kishan Gupta (45), were injured in the incident. Two men from the other family - Anand Kishore (in his 50s) and his son Sumit alias Summa (in his mid-20s)- were also injured.

Police said Sumit and Kishan Gupta were discharged after medical attention, while Kishore and his son were undergoing treatment and stable.

Sumit, Ashish (alias...