Authorities in Martin County are currently investigating after a teacher at Jensen Beach High School found a “graphic” note threatening a school shooting.

The note was found last Friday crumbled up next to the teacher’s desk.

According to the report, the note named nine students who will reportedly be targeted on September 8th.

“It was addressed to himself. It’s a memo to self, letter to self. Bring your gun to school on the date that we mentioned and shoot your intended targets,” Sheriff William Snyder said. “It’s pretty blunt. It’s pretty graphic.”

Authorities have launched an investigation into the origins of the note but say as of Wednesday, they still do not have a suspect.

“We’re treating it 100% as if it’s a legitimate threat,” Snyder said. “As far as I’m concerned, I have a threat to shoot nine students at one of our schools. And we’re absolutely reacting as if that threat will be carried out.”

Security at Jensen Beach High School has since been increased as well as the number of school resource officers on campus. Sheriff Snyder also stated that they plan to continue to increase the number of security forces present as the date listed on the note gets closer.

If you have any information that can help authorities, call Treasure Coast Crime Stoppers at 1-800-274-8477.