A retired firefighter who threw a fire extinguisher at police officers during the U.S. Capitol riot was sentenced on Tuesday to more than four years in prison.

Robert Sanford struck two police officers in the head with the fire extinguisher that he threw as he stormed the Capitol on Jan. 6, 2021 , with a mob of Donald Trump supporters. He also threw an orange traffic cone at a Capitol police sergeant.

Sanford also hurled obscenities and insults at the law enforcement officers on the Lower West Terrace, calling them traitors, a prosecutor, Janani Iyengar, wrote in a court filing.

One of the officers struck by the fire extinguisher had a bump and swelling on his head; the other had a headache and went to a hospital for a medical exam, prosecutors said.

U.S. District Judge Paul Friedman sentenced Sanford to four years and four months in prison followed by three years of supervised release, according to an online court record. Federal prosecutors had recommended a prison sentence of five years and 11 months.