WASHINGTON — Eight protesters were arrested Wednesday night during the Congressional Baseball Game, a yearly tradition that raises money for charities.

U.S. Capitol Police officers “quickly stopped” and arrested eight people as they tried to protest on the field, U.S.C.P. said in a post to X.

Police said that the protesters are being charged with interference with a member of the U.S. Capitol Police, a federal charge.

The U.S.C.P. public information office told NBC News that the protesters are still in police custody, where they are being processed and will be taken to jail. The office also said there were no reported injuries during arrests.

The group Climate Defiance took responsibility for the protest, posting pictures to X of protesters wearing shirts reading “end fossil fuels” jumping onto the field and being tackled or arrested by police officers.

“Eight of us have been arrested for shutting down the Congressional Baseball Game. They are behind bars right now,” said a post by the Climate Defiance group. “Make no mistake: It’s the Members of Congress who should be locked up.”

The group had also said on its website that it was “shutting down the congressional baseball game.”

When reached for comment, organizer Evan Drukker-Schardl said that “Congress and the fossil fuel industry have picked their side tonight: death and destruction for our entire planet.”

Drukker-Schardl also pointed to Chevron, an oil and gas company, sponsoring the game. The game had more than 100 sponsors. Comcast NBCUniversal is a sponsor of the game.

Capitol Police had discussed the possibility of protesters prior to Wednesday’s game, officials said in the post.

“Before the charity game, we were aware that some people planned to possibly protest,” U.S.C.P. said in the X post. “This was discussed during our planning meetings and put in our comprehensive action plan to ensure we had plenty of resources to swiftly respond.”

A few other protesters who held up a Palestinian flag in the stands also “left voluntarily” after violating ballpark rules, police said. These protesters were not arrested.

The Congressional Sports for Charity expressed gratitude for the police in a statement about Wednesday’s game.

“As always, we are grateful for the United States Capitol Police, Metropolitan Police Department, and all the other law enforcement agencies who worked around the clock to ensure the safety of this historic event,” the group said.

The statement also noted that the game, which pits Democrats and Republicans against each other, raised more than $2 million for D.C. charities.

Climate protesters have previously been arrested outside the baseball game in 2022.