CHINA GROVE — The second student in three days in Rowan-Salisbury Schools has been suspended for 10 days after making a violent threat on a school campus.

A 12-year-old sixth-grader at China Grove Middle School confessed to police that he scrawled a bomb threat on a bathroom wall.

On Thursday afternoon, the student told China Grove Police Capt. Dennis Andrade that he wrote the threat, Chief Michael Bentley said.

The District Attorney’s office referred the matter back to school officials.

Principal Don Bost suspended the student for 10 days, the maximum length a principal has power to suspend a student. Only the superintendent can give longer suspensions.

On Wednesday, a student at Knollwood Elementary School was suspended for threatening people in a written list. And detectives are still trying to determine who threatened several people in a list found March 23 at Southeast Middle School.