Rishabh, the bride's brother, was shot when a group of inebriated people from the groom's side, on reaching the hotel at around 10:30 PM yesterday, started firing randomly in the air, they said.
The victim, a student at Amity University, was rushed to a hospital where he was declared dead by doctors, police said.
"A case has been registered by the victim's uncle Rishi Gupta against Kamal Chauhan at Majhola Police Station," Circle Officer (Civil Lines) Yashveer Singh said, adding the complainant alleged that despite opposition the group kept on firing.