New Delhi, May 23 -- A 28-year-old man was arrested on Saturday after a brief exchange of fire in connection with a Thursday double murder case involving a 38-year-old woman and her 13-year-old son at their south Delhi's Govindpuri residence, police said.

The man, a cousin of the deceased woman, suffered a bullet injury in both legs during an encounter with the anti-narcotics squad of the southeast police district in the Govindpuri area around 2.30 am on Saturday, senior police officers familiar with the development said.

Deputy commissioner of police (southeast) Hemant Tiwari identified the suspect as Saurabh, a habitual criminal registered as a bad character (BC) at south Delhi's Sangam Vihar police station.

"We identified Saurabh af...