Michigan State Police, the Flint Police Department and the FBI are investigating after human remains were found at a park in Flint, according to police officials.
The remains have not been identified.
The scene is at Broome Park on Tuxedo Avenue and officials say canines were being used in the search.
A man walking his dog in the park reportedly found two human skulls - one in the parking lot and another in a field near a baseball diamond.
Investigators have yet to confirm whether the remains are from one or two bodies, but say a forensic expert is on the job.