SOUTH BEND, Ind. - The South Bend Fire Department is investigating a structure fire in the 1900 block of S. Michigan St. Wednesday. 

At 3:28 p.m., crews were called to Denny Moon's Auto Tech for the fire.

One person was inside at the time. According to officials on scene, he may have had smoke inhalation but was released at the scene after being checked out by medics.

Crews had the flames under control in 15 to 20 minutes.

Investigators are still determining the cause and origin of the fire.

At this time, the full scope of damage to the building is not known.  

A section of Michigan Street was closed but has since reopened to traffic.