Officials are investigating the cause of a fire at granite-crushing company, Martin Marietta, in Waite Park early Sunday morning.

 

The Waite Park Fire Department responded to the scene where the fire started just before 3 a.m. on Sunday. Fire fighters were able to get the blaze under control by 5 a.m.

 

The business was not open and no employee were there at the time of the fire.

 

A cause for the fire has not yet been determined. The Minnesota State Fire Marshall Division is assisting with the investigation.