Bayshore High School 15-year-old brought message to authorities.

MANATEE COUNTY — A student who said he found a threatening note in a bathroom at his high school this week later admitted to writing the message himself, the Manatee County Sheriff's Office reports.

According to the Sheriff's Office, a 15-year-old student at Bayshore High School told the school Thursday morning that he found a note in the bathroom. The note implied that because of bullying, the writer was going to shoot people at the school.

During the investigation, the student admitted that he wrote the note. A search of his home found no guns.

The boy has been charged with written threats of a mass shooting.