A young man celebrating New Year's Eve in the city has been punched in an unprovoked attack just minutes after the midnight fireworks.

Police are investigating an assault against student Tioram McDonough, 19, who was hit near Rebecca Walk in Batman Park about 12.15am on New Year's Day.

Tioram McDonough who was hit in an unprovoked attack after the New Year's Eve fireworks in the city. Credit:Nine News Melbourne

"It's alleged a 19-year-old Bentleigh East man was punched to the side of the head by a man ... in an unprovoked attack," a police spokeswoman said.

"The victim received minor injuries and anyone with information is urged to contact Crimestoppers."