A shelter-in-place order was lifted after the building was searched.
Phillipsburg High School was ordered to shelter-in-place for a time around midday Friday as authorities investigated a bomb threat.
The threat was found to not be credible, like another instance from almost two months ago when a threatening message was scrawled on a bathroom wall. The exact nature or method of Friday's threat was not disclosed.
Police cars from both Phillipsburg and Lopatcong blocked the entrance to the school around 1 p.m. New Jersey State Police assisted at the scene.
A shelter-in-place order was lifted after authorities searched the building, Lopatcong police said in a news release about 2 p.m. Officers remained at the school as classes resumed on a regular schedule.
Steve Novak may be reached at snovak@njadvancemedia.com. Follow him on Twitter @type2supernovak and Facebook. Find lehighvalleylive.com on Facebook.