SALISBURY — A 14-year-old student copied a Facebook post threatening to “shoot up SHS,” prompting administrators to put Salisbury High School on lockdown Thursday and Friday, the Salisbury Police Department said Tuesday.

The original threat, made under the name of Ray Andres, caused nationwide panic and was determined to have originated in Ohio.

The Salisbury High School freshman copied that post, according to police. The student changed an old Facebook account to mirror the account of the actual poster, then made a post specifically targeting Salisbury High School, police said.

In a juvenile petition, Salisbury police charged the ninth-grader with making an anonymous or threatening communication to the school.

A juvenile petition is a charge that is taken out by law enforcement and juvenile court counselors for someone younger than 16 who commits an offense that would be a crime under state law if committed by an adult.

Students at Salisbury High spent Thursday and Friday locked inside their classrooms in response to the online threat.

“Administrators at Salisbury High School have been notified of the young man’s juvenile petition and are taking appropriate actions on their end,” the Salisbury Police Department said in a news release. “This was an isolated incident involving only one student and no further arrests are anticipated at this time.”