Ms. Reitz noted that Mr. Miller had not been charged in connection with the smoke bomb, which remains under investigation. Mr. Miller was also released after posting a $1,000 bond, she said.

The police interviewed the woman who had taken the papers off the lectern, but Ms. Reitz said no other arrests were made on Tuesday. It was not clear whether the woman was a student.

No injuries were reported in connection to the evening’s mayhem, she said. The case remains open and additional charges or arrests could be forthcoming, she said.

“This was a very disappointing evening,” Susan Herbst, UConn’s president, said in a statement. “Thoughtful, civil discourse should be a hallmark of democratic societies and American universities, and this evening fell well short of that.”

Mr. Wintrich had been invited to speak at an event organized and hosted by the UConn College Republicans club, Ms. Reitz said. The event started around 8 p.m. and was to last about an hour.

About 300 people attended; some who attended were supporters, others were critics and still others came from the surrounding community and were not students, Ms. Reitz said.