UPDATE: Keystone College posted the message, “All clear, lockdown has been lifted,” on its Twitter page at 2:27 p.m.

LA PLUME — Keystone College issued an emergency alert to students via its Twitter and Facebook accounts at 12:58 p.m. regarding a “campus hazard.”

“Shelter in place, lock windows and doors, and await further communication,” the message reads. “This is not a drill.”

More information will be posted as it becomes available.