The younger son of U.S. Sen. Tim Kaine, D-Va., was one of six people arrested while protesting against a rally in support of President Donald Trump at the Minnesota state Capitol last weekend.

Linwood Michael “Woody” Kaine of Minneapolis resisted arrest on the Capitol grounds, where police used a chemical irritant and a knee strike while detaining him, according to a police statement.

Protesters clashed with hundreds of Trump supporters who gathered at the Capitol rotunda in St. Paul on Saturday for one of several pro-Trump rallies held throughout the country.

Woody Kaine and four other people were suspected of lighting a smoke bomb inside the Capitol, St. Paul police spokesman Steve Linders said Wednesday.

Woody Kaine, 24, ran from the scene and was arrested about a block away after he resisted arrest, was sprayed with a chemical irritant and was taken to the ground, according to a police report.

Kaine was booked into the Ramsey County Jail on a recommended second-degree riot charge and was subsequently released.

The Ramsey County Attorney’s Office declined to file criminal charges, finding insufficient evidence to substantiate the charge, spokesman Dennis Gerhardstein said Wednesday. The St. Paul City Attorney’s Office was reviewing the case and didn’t immediately reply to a message seeking comment.

Tim Kaine, a St. Paul native who was Hillary Clinton’s running mate last year on the Democratic presidential ticket, and his wife, Anne Holton, released a statement following their son’s arrest:

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

The group holding a pro-Trump rally in the Capitol had a permit, and about 400 people showed up for the rally, according to a police report. A group of protesters entered the building and five or six of them wearing all black set off fireworks and smoke bombs.

When St. Paul police arrived at the Capitol on Saturday to look for the fireworks suspects, they found them in a park on the grounds, according to a police news release:

“The officers identified themselves and ordered the suspects to the ground. At this point, the suspects attempted to flee.

“Officers were able to apprehend all five suspects, including Linwood Michael Kaine,” the release said.

“Kaine was ordered to the ground but failed to cooperate. He attempted to run but was caught by an officer, who took him to the ground. Kaine then got back on his feet and squared off with the officer, who re-engaged Kaine in an attempt to arrest him.

“While the officer was attempting to take Kaine to the ground, another officer arrived and deployed a chemical irritant known as ASR.

“At this point, Kaine was taken to the ground but continued to resist arrest. In an effort to get Kaine to comply with officers’ instructions, a third officer on scene delivered a knee strike. Kaine then cooperated, put his hands behind his back and was taken into custody without further incident.”

The St. Paul police do not wear body cameras, said Linders, the police spokesman.

Sen. Kaine and Holton’s older son, Nat, is a U.S. Marine who has deployed overseas. Their daughter, Annella, is a college student.

Woody Kaine attended a small liberal arts college about 45 minutes south of St. Paul.

Information from The Associated Press, The Washington Post and Times-Dispatch staff writer Patrick Wilson was used in this report.