Bomb threats at three Ivy league US universities caused evacuations and prompted police responses on Sunday.

In Ithaca, New York, Cornell police cordoned off the center of campus on Sunday after receiving a call that bombs were placed in four buildings. In New York City, Columbia University police issued a campus-wide emergency alert after receiving bomb threats at university buildings at about 2:30 p.m.

According to US media, Brown University officials in Providence, Rhode Island, sent a text alert to students that said police were investigating “multiple buildings on campus involving a bomb threat.”

The threats came two days after a bomb threat at Yale University forced the evacuation of several buildings, as well as nearby businesses in New Haven, Connecticut. Yale’s campus, resumed normal activities Friday evening, roughly five hours after the call was received.

In recent months, there have been numerous reports of bomb threats in various parts of the United States. 219

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Bomb threat shuts down Yale university in Connecticut, USA