Law enforcement in New Jersey is investigating a post on social media threatening schools in Camden and Gloucester Counties.

The Woodbury City school district canceled all classes on Monday, Sept. 9 following a social media threat. “While we do not believe the threat to be credible, we are exercising extreme caution to ensure the safety of our students,

In a post to Facebook, the Woodbury City Police Department said it was aware of the threat and that an investigation was underway.