People who occupied Columbia building were led by people unaffiliated with school, NYPD says
The mayor said those who occupied Hamilton Hall were led by people unaffiliated with Columbia University.
Those protesters made a change to more aggressive tactics and represented an "elevated concern," Rebecca Weiner, the NYPD deputy commissioner of intelligence and counterterrorism, said Wednesday.
"The situation had deteriorated to the point where the safety of students, staff and the public was at risk," Police Commissioner Edward Caban said.
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There were 282 arrests on a range of mainly minor offenses -- 173 at City College and 119 at Columbia.
"It was a tough decision," Adams said, of the university authorizing the NYPD to move onto campus. "The action had to end and we brought it to a peaceful conclusion."
-ABC News' Aaron Katersky