Six people were arrested Saturday night for a chaotic interruption of a “March 4 Trump” rally at Minnesota’s state capitol in St. Paul. They walked in sounding air horns, whistling and chanting, and one person detonated a smoke bomb. One of the disrupters who was arrested had a familiar name: Linwood Michael Kaine, 24, the youngest son of Sen. Tim Kaine (D-Va.), was arrested Saturday on suspicion of second-degree riot, which is a felony.

Four of the younger Kaine’s companions were arrested on suspicion of the same count, and one more was taken by police for disorderly conduct. All six of them were released Tuesday morning without charges.

Although Linwood Kaine, who goes by Woody, has not commented on the matter, his father released a statement to the local Pioneer Press Tuesday night.

“We love that our three children have their own views and concerns about current political issues,” he said. “They fully understand the responsibility to express those concerns peacefully.”

The elder Kaine was the vice presidential candidate on Democrat Hillary Clinton’s ticket for the White House last year.

The original demonstration was meant to be a show of support for President Donald Trump; “We are here today to declare Donald J. Trump is our president. We are behind him 100 percent,” said Minnesota Republican state Rep. Kathy Lohmer.

But about half an hour after speeches began, the counter-protesters came on the scene. The smoke bomb reportedly hit a woman in the head, and there were reports that fireworks and chemical irritants had been set off.

According to a police spokesman, Kaine was one of the four who was suspected to have lit fireworks. He ran away from the scene, but was caught down the street. Officers had to use “some force” to arrest him.

“He turned around and squared up to fight with the officer,” said the police spokesman. “The officer was able to place Mr. Kaine under arrest and take him to the Ramsey County jail for booking.”