(Braham, MN) — Three school buses are destroyed after a fire Tuesday morning in the Braham school bus garage. Isanti County authorities say flames were showing from the building and there were several explosions. No one was inside at the time. One firefighter was treated at the scene for exhaustion-related issues. Braham officials say there will be no disruption of bus service to the students getting to and from school. Investigators haven’t determine the cause.