MILWAUKEE (CBS 58) -- Milwaukee police are investigating a shooting that seriously injured a 32-year-old man near Ruby and Sherman. The man arrived at a local hospital with serious injuries early Tuesday, March 25.

The shooting took place at around 4:43 a.m., according to police. The circumstances leading up to the shooting are under investigation, and no arrests have been made.

Authorities said the suspect is unknown, though MPD is seeking information as the investigation progresses.

Anyone with details is asked to contact police at (414) 935-7360. Anonymous tips may be submitted through Crime Stoppers by calling (414) 224-Tips or using the P3 Tips online service.