GRAND RAPIDS, Mich. (WOOD) — Firefighters have ruled arson in a vehicle fire that happened early Tuesday, the Grand Rapids Fire Department said.

Around 4:50 a.m., firefighters responded to reports of a vehicle fire at 5th Street and Stocking Avenue NW, according to the Grand Rapids Professional Firefighters Local 366 Facebook page.

After investigating, firefighters are calling the fire arson, based on reports from witnesses and evidence found at the scene, GRFD said.

Firefighters said the fire burned very hot and was not put out easily, leading them to believe there was magnesium present. Investigation found that there was, in fact, magnesium in a part of the steering column in the car, which is commonly used in that type of part made by General Motors, said GRFD.