Seven people were taken to hospitals Sunday after violence broke out between a white supremacist group and counter-protesters, said authorities in Sacramento, California.

Two of the injured had critical stab wounds, Sacramento Fire Department spokesman Chris Harvey said. “It was a very chaotic situation and it’s unclear if all seven of the people transported had stab wounds, but there were seven (taken to hospitals),” Harvey said.

The Traditionalist Worker Party, or TWP, whose leader describes it as a “white nationalist” group, had a permit for a noon rally near the state Capitol, said Officer George Granada, California Highway Patrol public information officer with the Capitol Protection Division. Another group showed up “to stop them from carrying on their permit,” he said.

“They (counter-protesters) showed up ahead of time in a large group, probably 300 or more,” Granada said. “They were positioned around the Capitol to stop them (TWP demonstrators) from carrying on their permit.”