An 18-year-old Huntington Woods man told police he was assaulted while at a party in the 1400 block of Washtenaw Avenue in Ann Arbor Saturday night.
Officers were dispatched to the residence at around 11:30 p.m., said Lt. Renee Bush of the Ann Arbor Police Department.
The 18-year-old said the suspect struck him with a closed fist in the face. The man suffered a swollen lip and was taken to the University of Michigan Hospital for treatment.
The suspect is described as a white male between 18 and 24 with short curly blond hair. No other information was immediately available.
John Counts covers cops and courts for AnnArbor.com. He can be reached at johncounts@annarbor.com or you can follow him on Twitter.