They expect a repeat of violence that pre-empted former Breitbart news editor Milo Yiannopoulos' appearance at the school in February.
The conservative commentator initially agreed to speak at Berkeley on April 27 after college Republicans invited her, but the school canceled on Wednesday citing threats of rioting and other violence.
Dirks said police have "very specific intelligence regarding threats that could pose a grave danger to the speaker", her audience and protesters and urged Coulter to come speak at the later date instead.
"We have been unable to find a safe and suitable venue", officials wrote in a letter to the campus Republicans on Wednesday.
It appears UC Berkeley is in for another political brawl, this time with Ann Coulter, who tells The Hollywood Reporter that she'll speak at the famously progressive campus even though administrators are trying to prevent her from doing so.
These are rights that Coulter apparently understands to include speaking at Berkeley for $20,000. "But they can't stop me".
Ann Coulter's planned appearance at the University of California, Berkeley next week has been called off for security concerns.
The Post reported the school also planned to impose conditions on the events but the college Republican group said they would reject them, according to a representative of the student group. Listening, from left, are UCPD Capt. Alex Yao; Stephen Sutton, interim vice chancellor for student affairs; and Dan Mogulof, assistant vice chancellor for public affairs. "We also have an unwavering commitment to providing for the safety and well-being" of speakers, students and others, and "we can not compromise" on either of those responsibilities. We base our decisions regarding an event's timing and location on the objective analysis of the law enforcement professionals of UCPD as to how best to ensure safety for all while maximizing the chances that the event can take place as planned. Unfortunately, UCPD determined that, given now active security threats, it is not possible to assure that the event could be held successfully-or that the safety of Ms. Coulter, the event sponsors, audience, and bystanders could be adequately protected-at any of the campus venues available on April 27th. It noted that "most Mondays and Tuesdays in September during the day should work". We are confident that with sufficient lead-time and continued collaboration we can together do what is necessary to offer the broadest possible range of speakers and events on the Berkeley campus.