Updated

LARAMIE, Wyo. — Bill Ayers and a University of Wyoming student are suing the school after it banned the former 1960s radical from speaking on campus.

Ayers, who is a professor at the University of Illinois-Chicago, makes college speeches and is routinely picketed, but the University of Wyoming last week banned him from using any university venue for a planned April 28 lecture.

Ayers and student Meg Lanker sued on Thursday, asking a federal judge to issue an injunction and allow the lecture. The lawsuit alleges the ban violates free speech rights and the freedom to assemble.

A university spokeswoman declined to comment on the suit.

Lanker told the Casper Star-Tribune that Ayers will speak at the Laramie Civic Center if he's not allowed on campus.