Authorities say that after a visit to Harvard University, dozens in a group of high school students and their adult chaperones were injured when their charter bus hit a bridge after police say the driver failed to heed low-clearance warning signs.
Emergency officials say 34 people were injured, including one person with life-threatening injuries.
The Calvary Coach bus was heading to the Philadelphia area when it struck an overpass on Soldier's Field Road in Boston on Saturday evening. Some passengers were trapped for more than an hour as rescue crews worked to free them.
The students were part of a Destined for a Dream Foundation group. Officials with the Bristol, Pa.-based group, a nonprofit that helps underprivileged youth, refused to comment on the crash when reached by phone.
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