The Yale Police Department and New Haven bomb squad responded to a report of a suspicious package outside Woodbridge Hall today, but the apparent threat proved to be a false alarm.

Officers arrived shortly before 5 p.m. and closed Beinecke Plaza and part of Wall Street between College and High streets. Bomb technicians donned protective gear and used a robot to inspect the brown cardboard box, which they found contained copies of the book “Wild Animus.” Wall Street was reopened about 20 minutes later.

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Similar boxes, with the same “Wild Animus” books, were seen elsewhere on campus Tuesday, including in front of Saybrook and Trumbull colleges.

Deputy Secretary Martha Highsmith, who oversees campus security, confirmed the false alarm. She said the response was standard procedure and was not in response to the attempted bombing in New York City’s Times Square over the weekend.

“We responded as we normally do,” Highsmith said.

New Haven saw a spate of bomb threats in March, including at the Omni Hotel, two public schools and three local courthouses.

Colin Ross contributed reporting.