A Minneapolis man has been ordered detained after authorities say he threatened law enforcement officers after six other men were arrested for allegedly trying to join the Islamic State group in Syria.

Nineteen-year-old Mahamed Abukar Said is charged with one count of impeding and retaliating against a federal law enforcement officer and one count of using interstate communications to make threats to injure. An FBI agent testified Wednesday that Said admitted to sending some tweets authorities viewed as threatening.

Said's sister, Ayan Said, testified her brother jokes a lot and "wouldn't hurt a fly."

Last week, authorities charged six Minnesota men with conspiracy to support a foreign terrorist organization. Authorities say the men were intent on going to Syria, even after many had been stopped from traveling previously.