MINNEAPOLIS (WCCO) – The cause of fire at Roosevelt Early Childhood Center in St. Cloud, Minn. on Saturday has been linked to lightning.

According to the St. Cloud Fire Department, officials responded to an automatic alarm around 11:30 p.m. Saturday, June 14.

READ MORE: MN Weather: Over 6 Inches Of Snow Possible In Northern MN This Weekend

Upon arrival, firefighters noticed smoke coming from the west end of the building.

READ MORE: Minnetonka's Kiani Lockett Is Taking Nothing For Granted

Crews entered the building and headed west, feeling heavy heat and seeing more smoke, but excited the building after they noticed parts of the ceiling collapsing.

An investigation into the cause of the fire found that a lightning strike occurred within the immediate vicinity of the school around 8:36 p.m.

MORE NEWS: Minnesota Weather: Over 6 Inches Of Snow Possible In Northern MN This Weekend, Cold Temps To Follow

The investigation also showed that the fire was smoldering for roughly three hours before the automatic alarm was triggered.