A group of demonstrators at Middlebury College in Vermont “aggressively confronted” guest speaker Charles Murray and a Middlebury professor Thursday afternoon, a skirmish that turned violent and left the professor injured.

Murray, a controversial libertarian scholar, and Allison Stanger, a Middlebury College international politics and economics professor, were shoved by protesters as they left the McCullough Student Center, where Murray had given a talk, according to Middlebury College’s president, Laurie Patton.

One protester pulled Stanger’s hair and injured her neck. She was taken to a hospital, where she was treated and released.

In a statement, Patton apologized for the attack, saying she was “deeply disappointed by the events that I witnessed.”

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