A former student armed with a rifle stalked the halls of a Florida school, breaking windows and shooting terrified students in a massacre that left 17 people dead Wednesday, authorities said.
The suspect, Nikolas Cruz, 19, had been expelled from Marjory Stoneman Douglas High School over disciplinary problems, Broward County Public Schools Superintendent Robert Runcie said, without providing specifics.
Cruz allegedly turned on the fire alarm, sending many outside, where he fired shot after shot before following fleeing students inside the building, officials said. There, he roamed the halls he knew so well, allegedly targeting those huddled in classrooms.
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