Collegedale police were called early Saturday to a report of a stabbing and a commercial structure fire at Shaffer's European Bakery, 9619 Apison Pike.
The call came at 7:39 a.m., according to a news release. Officers arrived and helped a male patient until Hamilton County EMS and Tri-Community Fire Department arrived, the release stated.
The investigation is ongoing and anyone with information is asked to call the Collegedale Police Department at 423-396-3133.