U.S. Democratic presidential candidate Bernie Sanders speaks to a large crowd of supporters in Carson, California, U.S., May 17, 2016. Reuters/Lucy Nicholson Supporters of Sen. Bernie Sanders' (I-VT) presidential campaign have secured permits to hold rallies near the Democratic National Convention in Philadelphia in July, the Wall Street Journal reported Friday.

The Sanders backers, who are not officially associated with the campaign, got a four-day permit for rallies at FDR Park, which is located next to the convention venue, the Wells Fargo Center.

The city anticipates 30,000 people will attend the gathering, and the organizers told the Wall Street Journal that they're hoping for more.