Monmouth University in West Long Branch, New Jersey, has issued a shelter-in-place order for students due to a "possible armed subject."

Monmouth University Police received a report at 9:15 p.m. of a "possible armed subject" on campus, the school said in an alert posted to its website.

"Students should comply with the shelter-in-place order -- They should not leave campus, nor should anyone come to campus," the university said. "Please leave police phone lines open for emergency calls."

Multiple local and county law enforcement agencies are searching and securing the campus, the university said.

This is a developing story. Please check back for updates.