SALISBURY — Salisbury High School was placed on lockdown Thursday morning in response to a threat made over social media.

In a Connect Ed message sent at 7:30 a.m., Principal Luke Brown told parents that on Wednesday evening, a threat targeting a school with the initials “SHS” was circulating on Facebook. Law enforcement officials determined that the threat was made against a school in another state.

“It was confirmed by law enforcement that this threat was not associated with our school,” Brown said.

Salisbury High was placed on a Code Yellow lockdown as a precautionary measure. A Code Yellow lockdown means that outside doors are locked and secured and students cannot leave the school building.

But a short time later, the lockdown was upgraded to a more secure Code Orange after Brown said an additional Facebook posting was made.

“We will continue to work closely with law enforcement and take all necessary measures in assuring that our school remains safe,” he said.

The second message was sent out at 8:40 a.m. Thursday.

A Code Orange lockdown means that inside and outside doors are locked and that classroom doors are locked. Students remain in their classrooms and classwork continues.

Schools across the nation were thrown into a panic Thursday and Friday morning after a vague post on the Facebook account of Ray Andres.

While the original post and account seem to have been taken down, screenshots were widely circulated by parents, students, news organizations and law enforcement agencies.

The first post reads: “I will not be telling people what my name is, but I will bring a gun to school tomorrow so be prepared to hear shots.”

A post made 10 minutes later says “Yes SHS is the school I want.”

The posts, while determined to not be specifically targeting Salisbury High School, have caused rumors in and around Salisbury.