CHICAGO (CBS) — A 21-year-old man already charged with trying to set off a bomb downtown three years ago has been indicted on new charges of attacking and seriously injuring a fellow inmate.

Federal prosecutors have alleged Adel Daoud fashioned a weapon, and used it to try and kill a fellow inmate at the downtown Metropolitan Correctional Center. The victim was seriously injured in the attack.

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Daoud’s attorney said the attack was prompted by Daoud’s anger over a cartoon drawing of the Prophet Muhammad.

A grand jury has indicted Daoud on three counts of assault, including one count of assault with intent to murder.

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Daoud has been held without bond since 2012, charged with plotting to detonate what he thought was a car bomb outside a Chicago bar. The phony bomb was provided by undercover federal agents who had been monitoring Daoud, who was arrested after pressing the trigger.

It’s the second time since Daoud was incarcerated that he was charged with an additional crime. In 2013, he was accused of trying to arrange the murder of the undercover FBI agent in his original case as Daoud was being held at the Kankakee County Jail.

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The trial for the 2012 charges has been scheduled for October.