A 15-year-old boy was killed and an 18-year-old man was injured after a group of nearly a dozen people allegedly resorted to firing and stabbing in south Delhi’s Tigri Camp late on Monday, triggering panic and fear among local residents. Two separate cases of murder and attempt to murder have been registered.

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Police officers said preliminary probe has revealed that the attack was the result of enmity between two groups over a past incident.

Later in the day, an 18-year-old man was arrested and two minor boys were apprehended for their alleged involvement in Monday night’s violence.

“The three apprehended persons told us that the attack was planned and led by one Annu alias Sourabh in retaliation of the murder of one Vinay that was recently reported in Dakshinpuri area. Their disclosure is being verified and corroborated with the facts pertaining to Vinay’s murder,” said deputy commissioner of police (south) Atul Kumar Thakur, adding that raids are being conducted to nab Annu and other absconding suspects.

“One boy aged 15 was declared brought dead at the AIIMS Trauma Centre. He had suffered injuries in the attack. The other injured person, Amman alias Mohammad Ali,18, was fired upon and stabbed by the group of attackers. He is undergoing treatment,” said DCP Thakur.

Police said that Amman’s statement has been registered and using the details and physical descriptions of the attackers that he gave, the investigating team are looking for the suspects and conducting raids to nab them.

To avoid further clash, police personnel remained deployed in Tigri Camp area throughout the night.