A body floating in the Kalamazoo River has police looking into the possibility of criminal activity.

The Kalamazoo Department of Public Safety says in a release that officers were called around 11:45am Tuesday, to the area of Gull Rd. and Ray St, after passerby noticed the dead man in the river. The man, described as a white male in his 50’s, has not been identified, and authorities say that an autopsy will be performed to figure out how exactly the man died.

As well, investigators are trying to determine how the man ended up in the river.