Two men were charged for participating in violent demonstrations in Portland, federal officials said.
Another demonstrator later removed the wood and tried extinguishing the flame.
The situation unfolded at approximately 1:30 a.m. on July 13.
A Department of Homeland intelligence specialist analyzed footage from the demonstration and provided federal agents images of Peter Weier, the demonstrator who tried wedging the wood.
Weier was arrested at 3:30 a.m. after the crowd thinned out. He admitted to being part of the crowd but denied touching the burning piece of wood, though he said he saw the person who had.
According to the documents, Weier violated a federal law that states: “Whoever maliciously damages or destroys, or attempts to damage or destroy, by means of fire or an explosive, any building, vehicle, or other personal or real property in whole or in part owned or possessed by, or leased to, the United States, or any department or agency thereof, or any institution or organization receiving Federal financial assistance, shall be imprisoned for not less than 5 years and not more than 20 years, fined under this title, or both.”
The Mark O. Hatfield Courthouse is a federal building.
Another demonstrator, Benjamin Bolen, assaulted a federal officer, according to a charging document. He was charged with a misdemeanor.
Bolen was also arrested for disorderly conduct after violent demonstrations following President Donald Trump’s election in 2016.
Riots and demonstrations in Portland have continued virtually unabated since May 26.
The Portland Police Bureau said Wednesday that a “couple hundred” demonstrators gathered again in Portland, some of whom later lit fires near the Justice Center, a building that contains a police precinct. The group later hurled glass bottles and pointed lasers at officers who removed barricades set up in a street.
The assault came after the man was captured on video using the hammer to try to bash in a door to the federal courthouse.