A former chairman of the right-wing Proud Boys group has been sentenced to 22 years in prison for his role in the assault on the US Capitol by supporters of Donald Trump trying to overturn the former president’s election defeat.

Enrique Tarrio was given the longest sentence so far handed down in connection with the January 6, 2021 riots despite not being present at the Capitol Building that day.

“This was a calculated act of terrorism,” federal prosecutors said on Tuesday (local time) at a sentencing hearing in US District Court for the District of Columbia.

“He practised, and he endorsed the use of misinformation.”

Tarrio was convicted of seditious conspiracy, for his role in planning the storming of the Capitol, when thousands of supporters of the Republican then-president sought to stop Congress from certifying the results of an election that Mr Trump falsely claimed had been tainted by widespread fraud.

Prosecutors had asked District Judge Timothy Kelly to sentence Tarrio to 33 years behind bars, saying he helped direct the attack from Baltimore.

Tarrio’s lawyers had asked for a substantially shorter sentence.

Judge Kelly last week sentenced another far-right Proud Boys leader, Ethan Nordean, to 18 years, less than the 27 years prosecutors had sought. In May, Oath Keepers militia founder Stewart Rhodes was also sentenced to 18 years.

More than 1100 people have been arrested on charges related to the Capitol assault. At least 630 have pleaded guilty and at least 110 have been convicted at trial.

Five people, including a police officer, died during or shortly after the riot and more than 140 police officers were injured. The US Capitol suffered millions of dollars in damage.

Special Counsel Jack Smith, who was tapped to investigate broader efforts to overturn the 2020 election, has charged Mr Trump, the front-runner for the 2024 Republican presidential nomination, for trying to keep himself in power.

– AAP