It wasn't immediately clear why the school was in that protective status.
Phillipsburg High School was on lockdown late Tuesday morning, but it wasn't immediately clear why.
Lopatcong Township police cars at 11 a.m. were blocking the main entrance at Roseberry Street and Belvidere Road in the township.
Police said the school was on lockdown and it wasn't clear when it would be lifted. Phillipsburg Mayor Stephen Ellis clarified to say it was a soft lockdown.
A person who answered the photo at the school referred all questions to the Education Center. Superintendent George Chando didn't respond to phone messages and texts and township police Chief Jason Garcia couldn't immediately be reached. A person who answered the phone at the police station said everyone was out.
Photographer Saed Hindash contributed to this report.
Tony Rhodin may be reached at arhodin@lehighvalleylive.com. Follow him on Twitter @TonyRhodin. Find lehighvalleylive.com on Facebook.