A Hamas flag was spotted at an anti-Israel rally in Chicago Monday hours before the Democratic National Convention was set to begin. 

A photographer for Fox News spotted what appeared to be a Hamas flag in the crowd at the March on the DNC rally. The Hamas flag shared a pole with a Palestinian flag. 

Hundreds of organizations were expected to take part in the rally, voicing their opposition to Israel’s ongoing war against Hamas militants in the Gaza Strip. 

Chicago officials said they were committed to keeping the demonstrations peaceful, though the city remains on edge. Police officers are prepared to intervene if necessary, having undergone extensive training on constitutional policing and de-escalation tactics.

LEADER OF RADICAL GROUP THAT AMPLIFIED PRO-HAMAS ESSAY MADE MULTIPLE VISITS TO BIDEN-HARRIS WHITE HOUSE

Hamas flag at DNC rally

An attendee appears to wave a Hamas flag at a rally near the DNC.  (Fox News )

"The U.S. Secret Service, along with its federal, state, and local partners, respects the right of the public to demonstrate. We make no distinction on the purpose, message or intent of any particular group," Chicago police told Fox News Digital in a statement. 

"The Chicago Police Department, as well as other partners, are prepared to manage demonstrations, enabling groups to express their First Amendment rights safely. If individuals or groups decide to act unlawfully, plans have been put in place to efficiently and safely address them."

Protesters have vowed to keep the pressure on Democrats despite President Biden dropping out of the race and the party rallying behind Vice President Kamala Harris, who is expected to formally accept the Democratic nomination this week. 

Activists said they were ready to amplify their progressive message before the nation's top Democratic leaders.

Signage at the United Center ahead of the Democratic National Convention

Signage at the United Center ahead of the Democratic National Convention (DNC) in Chicago, on Sunday, Aug. 18, 2024. (Hannah Beier/Bloomberg via Getty Images)

The Chicago area has one of the largest Palestinian communities in the nation, and buses were bringing activists from all over the country. Organizers said they hoped the turnout for Monday's march and rally would be at least 20,000 people.

GET THE LATEST UPDATES FROM THE 2024 CAMPAIGN TRAIL, EXCLUSIVE INTERVIEWS AND MORE AT OUR FOX NEWS DIGITAL ELECTION HUB

Activists say they learned lessons from last month's Republican National Convention in Milwaukee. They expect bigger crowds and more robust demonstrations in Chicago.

Pro-Palestinian supporters descended on the park, west of the Loop business district, for a rally. They planned to march a short distance to a site near the United Center, where the convention is taking place.

Chicago, which has hosted more political conventions than any other U.S. city, has been unable to escape comparisons to the infamous 1968 convention where police and anti-Vietnam War protesters violently clashed on live television.

CLICK HERE TO GET THE FOX NEWS APP

Some businesses boarded up their windows as a precaution, and county courts said they would open more space in case of mass arrests. 

The Associated Press contributed to this report.