Real threat or false alarm? It's a question persistently being asked at schools across the country.

Some students at UMass Boston remained on high alert less than a day after an unconfirmed report of a shooting prompted an evacuation on Thursday — one of a wave of incidents across the country, and the second massive police response at a University of Massachusetts campus in two weeks.

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"Some people might just want the attention, and they'll just continue, and I'm worried about that, of course," said Meet Patel, a UMass Boston student.

Last week, on the first day of classes at UMass Lowell, a person with what appeared to be a gun prompted a lockdown -- the apparent weapon was later confirmed to be an air-soft repl

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