The son of Hillary Clinton's former running mate, Sen. Tim Kaine, was one of six arrested Saturday protesting a rally in support of President Trump at the Minnesota State Capitol.

Linwood Michael Kaine, 24, and four others were arrested on suspicion of second-degree riot at the “March 4 Trump” rally in St. Paul. Another person was cited for disorderly conduct, the St. Paul Pioneer Press reported.

Kaine, who lives in Minneapolis, was released from the Ramsey County Jail Tuesday pending a further investigation, authorities said. No charges were filed against him or the four others. The city attorney is reviewing the incident.

Kaine was involved in a skirmish between Trump supporters and counter-protesters, St. Paul police spokesman Steve Linders said.

Linders said Kaine was seen with four people who lit fireworks in the capitol and fled. Police were investigating whether Kaine lit a firework, the newspaper reported.

Linders said Kaine and the group were arrested a block from the capitol. He said police tracked Kaine and the group down and arresting officers had to use “some force” to take him into custody.

No one from Sen. Kaine’s office contacted the department, he added.

Sen. Kaine and wife Anne Holton released a statement Tuesday night.

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

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Ryan Gaydos is a news editor for Fox News. Follow him on Twitter @RyanGaydos.