Officials are battling a fire at a building that is part of the Heidelberg Project in Detroit. According to fire officials, the building is at the corner o Heidelberg and Mt. Elliott streets. it started around 6:45 a.m. and when they arrived, it was fully engulfed. A spokesman for the fire department tells us that the building will have to be demolished. No injuries have been reported, and crews are now just putting out hot spots on the fire. Police say a 49-year-old woman has been identified as a person of interest in the fire. She was taken into custody on an unrelated warrent. Police are investigating whether she's connected to the incident.