Protesters broke through a fence set up by police near the site of the Democratic National Convention on its opening day Monday as thousands took to the streets to voice their opposition to the war in Gaza.

As the larger group marched, a few dozen who broke away tore down pieces of the security fence. Some protesters, dressed in black with their faces covered, dragged pieces of the fence back to a park near the United Center, where the convention is being held.

Several protesters who had managed to get through the fence were detained and handcuffed by the police.

Authorities said the inner security perimeter surrounding convention site was not breached and there was no threat to those attending the convention.

Members of the crowd chanted “End the occupation now” and then “The whole world is watching!” just as anti-Vietnam War protesters did during the infamous 1968 convention in Chicago when police clashed with protesters on live television. Officers put on gas masks as some protesters tried to bring down a second fence set up in front of police.

The march happened just as President Joe Biden, who has been the target of intense criticism from pro-Palestinian groups, including the marchers, was doing a walk-through of the largely empty United Center. Biden was scheduled to address the party in the evening.

“Biden, you can’t hide. We charge you with genocide,” the marchers chanted amid the beating of drums. They also referred to him as “Genocide Joe” and lodged similar chants at Vice President Kamala Harris.

(AP)