A two-alarm fire gutted 10 temporary classroom trailers at a Waldorf, Md., middle school Wednesday, and investigators believe a lightning strike ignited the blaze, Charles County volunteer fire officials said.

More than 100 firefighters battled the blaze at John Hanson Middle School after a fire ignited on the roof of a trailer behind the main school building about 6 p.m., said Bill Smith, coordinator for Charles County volunteer Fire and EMS services.

No injuries were reported.

Investigators received reports that lightning struck the roof of one of the buildings as thunderstorms powered through the area. The 10 trailers were connected to each other and all were significantly damaged or destroyed as the fire quickly spread among them.

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