VANCOUVER, Wash. (AP) -- Two rail cars carrying grain from Montana overturned in Vancouver, Wash., and dumped an estimated 15 to 20 tons of grain into streets on the edge of the city's downtown.

The Columbian newspaper reports that the derailment happened at about 8 a.m. Thursday near the intersection of West 11th and Jefferson streets. It isn't clear what caused it.

The train was made up of three locomotives hauling 104 cars of grain from Glasgow, Mont. It had traveled through the Columbia River Gorge and was arriving in Vancouver when the cars dislodged from the tracks and fell over.

There were no injuries reported. Burlington Northern-Santa Fe spokesman Gus Melonas says crews using vacuum trucks are expected to have the mess cleaned up by Friday morning.

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Information from: The Columbian, http://www.columbian.com

Copyright 2010 The AP.