A 12-year-old middle school student is accused of threatening a mass shooting on school grounds, police announced Sunday.

Authorities were made aware Friday morning that a warning of a shooting at Coakley Middle School was distributed via group text. Police say a portion of the message was warning the event would take place on Monday and one of the numbers in the group was unknown while the rest were students, police say.

Police say the message indicated the sender had some knowledge of the middle school.

Although the sender tried to hide the source of the number, police say they identified the student who allegedly wrote the message by 10:30 a.m. Friday morning. Norwood police say officers even spoke with the student in question on the phone, who was traveling out of state with family at the time.

Families in Norwood were advised that police did not believe the threat to be credible but placed an extra police presence at Coakley Middle School on Friday, police say.

On Sunday, the student returned home, where Norwood police executed a search warrant, seizing their cell phone. After confessing to the act in front of family, police arrested the student.

There were no firearms found in the home and the student will not be in school on Monday, police say.

Police say on Friday a subsequent text began to circulate indicating the high school was next but police say the message was “spoofed” it was and the cell phone provider verified the arrested student did not send it.

“As we have previously stated, we enjoy a strong working relationship with Norwood Public Schools and are pleased that we have been able to bring this investigation to a successful conclusion,” Norwood police stated.

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