A Chinese scientist has been arrested while arriving in the U.S. in Detroit.

Two scientists from China have been charged in Michigan in what the FBI says was an effort to bring a toxic fungus to the U.S. Investigators say the pathogen can attack wheat, barley, maize and rice and sicken livestock and people.

Federal authorities say they arrested a 19-year-old man who is accused of planning an attack on a U.S. Army site in Michigan on behalf of Islamic State.