A member of a far-right anti-government group pleaded guilty Thursday in U.S. District Court in Minneapolis to a federal riot charge in connection with civil unrest after George Floyd's murder.

Ivan Harrison Hunter admitted to traveling from San Antonio, Texas, to Minneapolis "with the intent to participate in a riot," according to a news release from the U.S. Attorney's Office in Minnesota.

According to the charges, Hunter, who was wearing a skull mask and tactical gear, shot 13 rounds at the south Minneapolis police headquarters while people were inside during the riots of May 2020. He also looted the building and helped set it ablaze, according to the complaint.

In June 2020, police in Austin, Texas, stopped a pickup truck carrying Hunter and two other people. He had six loaded magazines for an AK-47-style assault rifle in his tactical vest. Officers also found several semiautomatic rifles and two pistols.

Federal agents said Hunter was affiliated with Boogaloo Bois member Steven Carrillo, who was charged in the May 29, 2020, murder of a federal officer in Oakland, Calif.

The term "boogaloo" refers to an impending second civil war in the United States associated with violent uprisings against the government.