The crowd inside of the University of Illinois Chicago Pavilion had been waiting for the Republican presidential hopeful to take the stage when an announcement was made to cancel the rally.

“Mr. Trump just arrived in Chicago and after meeting with law enforcement has determined that for the safety of all the tens of thousands of people that have gathered in and around the arena, tonight’s rally will be postponed until another date,” the announcement said. “Thank you very much for you attendance and please go in peace.”

Opponents to trump celebrating that he postponed tonight’s rally at UIC pavilion in Chicago pic.twitter.com/m5cy64C9BU

— Tony Arnold (@tonyjarnold) March 12, 2016

Protesters responded with cheers, while his supporters began chanting, “We want Trump!” A man attempted to jump on stage, but was removed by security. Several fights have been reported breaking out inside the Pavilion.

Nearly fisticuffs #TrumpChicago pic.twitter.com/5UmPyEx5IU

— Geoff Ziezulewicz (@JournoGeoffZ) March 12, 2016

The situation outside was no calmer. Videos have surfaced of protesters and supporters nearly coming to blows as both groups had to be restrained.

“You can’t even have a rally in a major city in this country anymore without violence, or potential violence,” Trump told MSNBC’s Chris Matthews.

This man brought out a gun after protesters stopped his car pic.twitter.com/YwfPvRJbS3

— Brian Nguyen (@bhngyn) March 12, 2016

Chicago police spokesman Anthony Guglielmi told CNN that there were no reports of injuries or arrests at the event, and that the decision to postpone the rally was not made by the police. “They did not consult us at all,” he said, according to USA Today. “The decision was made by the campaign on its own.”