Conservative commentator Ann Coulter said Wednesday that her planned speech at the University of California at Berkeley this week was canceled amid mounting concerns about potentially violent protests.

Coulter said in an email that the Young America’s Foundation canceled her appearance scheduled for Thursday, ordering her not to go to the Berkeley campus. The university realized that the group “wasn’t serious and dropped ongoing negotiations over a room,” she wrote. “Everyone who should be for free speech has turned tail and run.”

The university sent a message to the campus community Wednesday in the midst of uncertainty over whether, or when, Coulter might come to campus. After the university originally canceled her speech for Thursday and instead invited her to speak there next week, Coulter had vowed to speak anyway; with the university not offering a venue, campus Republican groups had been discussing her possibly appearing on a public plaza, where security would have been challenging.

Before Coulter’s cancellation, the university was girding for potentially violent protests on campus on Thursday, when she was expected to give a speech, potentially on Sproul Plaza, a sprawling open area known for gatherings and demonstrations.