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© The Roanoke Times, Alan Kim / AP



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Government officials now say at least 32 people - in addition to the gunman - have been killed today at Virginia Tech University, making it the deadliest mass shooting in U-S history. It's not clear if the gunman killed himself or if he was killed by police.Witnesses at the school say they saw students jumping out the windows of a classroom building to avoid gunfire. The first shooting happened in a dorm on one side of campus, and was followed at least two hours later by the shootings in the classroom building, which is on the other side.Some students say they thought precautions on campus had been lifted after the first shooting.