RIVERSIDE, California -- A Boise man who was convicted in 2015 of terrorism-related crimes has been indicted after prosecutors say he attacked the warden at the federal prison where he was held.

Fazliddin Kurbanov, 34, was just months into a 25-year sentence when the attack happened May 31, 2016 at the Federal Correctional Institute in Victorville, California.

He was indicted Wednesday on charges of attempted murder of a federal officer, assault on a federal officer with a deadly or dangerous weapon, and possession by an inmate of a prohibited object intended to be used as a weapon.

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According to the U.S. Attorney's Office, Kurbanov used a prison-made knife to attack Calvin Johnson, seriously injuring him. According to the Amercian Federation of Government Employees, the warden needed more than 80 staples to close wounds on his torso.

The indictment describes the knife as "a metal blade or 'shank' approximately three to four inches in length."

Kurbanov was moved to FCI Terminal Island in San Pedro after the attack. Johnson, who recovered from his injuries, is also now working at a different prison.

Kurbanov, an Uzbek national, was convicted of one count of conspiracy to provide material support to a terrorist organization, one count of attempting to provide material support to a terrorist organization and one count of possession of an unregistered destructive device in November 2015.

Prosecutors in that case outlined how Kurbanov communicated online with members of the Islamic Movement of Uzbekistan, promising to send money and supplies, and expressing interest in carrying out an attack in the United States.

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Kurbanov told FBI informants that he was considering Ann Morrison Park or Mountain Home Air Force Base as possible attack sites. Although he did not carry out any attack before his arrest, Kurbanov had stockpiled explosive ingredients including including fertilizer, Tannerite, ammonium nitrate, acetone and aluminum powder in his Curtis Road apartment before his arrest.

If convicted of the latest charges, he could face an additional 45 years in prison.