Prosecutors say a judge overseeing terrorism cases in Minnesota is among those who were threatened over Twitter last year.

Twenty-year-old Khaalid Adam Abdulkadir is accused of tweeting threats against the judge and FBI agents after one of his friends was arrested on terrorism charges.

Prosecutors were ordered last week to get specific about who Abdulkadir allegedly targeted.

In a document filed Wednesday, prosecutors say Abdulkadir threatened U.S. District Judge Michael Davis, who's been overseeing the terrorism cases. They say Abdulkadir also threatened the FBI agents and task force officers who are investigating the travel of young men from Minnesota to Syria to join the Islamic State group.

A federal judge from South Dakota is overseeing the case because of the nature of the charges.

Abdulkadir faces a March 8 trial.