Campus police deploy 'chemical irritant' at University of Arizona
Campus police officers at the University of Arizona in Tucson shot "chemical irritant" munitions at a gathering of protesters early Wednesday, the department said.
The university's president, Robert C. Robbins, had asked the campus police and school officials to "immediately enforce campus use policies and all corresponding laws," according to a statement from his office.
The Tucson Police Department and other law enforcement agencies also responded to campus, the university said.
Campus officers closed several blocks of Park Avenue as they responded to the "unlawful assembly," the department said.
Video appeared to show police handcuffing individuals on the ground and protesters forming a human chain facing officers.
"Police deploying chemical irritant munitions," the department said amid a series of updates on social media. "Follow orders of police and disperse immediately. Avoid the area of University Blvd & Park Ave."
-ABC News' Amanda Morris and Kevin Shalvey