Boston fire officials are trying to determine how a pair of trucks in a commercial lot in Hyde Park caught fire Saturday night.
Fire crews were called to 1661 Hyde Park Ave. just after 7 p.m., according to the fire department.
A tractor-trailer and an RV were fully engulfed with flames as firefighters worked to put out the blaze.
Because the lot was adjacent to Commuter Rail tracks, service had to be shut down for more than an hour because of the intensity of the smoke.
One firefighter was taken to a hospital for a minor injury.
The cause is under investigation.
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