Reports of a tour bus crash in Boston, Mass., tonight indicate that 25 or more people have been injured.

Massachusetts State Police say the bus was overheight and collided with an overpass, trapping passengers inside. The bus was reportedly en route from Harvard to Pennsylvania.

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Update: The Boston Fire Department has been using Twitter expertly to report progress on the scene of the accident and keep the public informed.

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Update: Three are reported in critical condition tonight following the crash.