All schools in New Jersey’s Montclair School District were closed Monday because of a social media threat directed at a specific staff member, according to Montclair police. Law enforcement officials believe the threat came from a staff member who is currently on administrative leave,

A 45-year-old teacher on leave from Montclair school district has been charged with making terroristic threats against another staffer.

The police said a teacher at an elementary school who had recently been put on administrative leave was found in a “manic state” in Philadelphia and was apprehended.