HIGHLAND PARK (CBSDFW.COM) — Students at Highland Park High School were dismissed at 11:00 a.m. on Tuesday after a threatening note forced a campus-wide evacuation.

Jacki Moran with Highland Park ISD confirms that the district received a threatening note.

University Park spokesman Steve Mace says that three or four patrol officers, plus the resource officer on campus, assisted in the evacuation. As of 11:45 a.m., all students and staff had been cleared from the building.

Parents are instructed to pick up their children at the multipurpose facility across from Highlander Stadium.

The district confirms that three similar notes were discovered last month on campus.

The school is responding for safety, but the district is growing frustrated.  “The lives of more than 2,000 people (are) being completely disrupted by a threat,” says Highland Park ISD spokeswoman Helen Williams.  “And from what we know, it is simply a hoax and not a legitimate threat to safety.  But, it does scare people.”

The other threats were characterized as bomb threats by Highland Park ISD officials and were found in boys bathrooms. At the time, police said they believed the notes were a hoax.

Austin York Reports On KRLD

The content of Tuesday’s note has not been released.  “They’re all threatening notes regarding the bombing.  The police have the notes and it will be up to them as to whether to release the actual verbage from those,” said Williams.

A former AFT agent told CBS 11 when it comes to bomb threats at schools, 99.9 percent of the time kids are doing it to get out of school.

And now days off are beginning to add up.  The school says the students will have to make them up.

The district sent the following message to parents and staff.

Dear HPISD Parents & Staff,

Highland Park High School dismissed students at 11 a.m. today after a threatening note was found on campus.

Parents whose students need transportation may pick up their children at the multipurpose facility across from Highlander Stadium.

HPISD leaders will continue to work with police to investigate the threat. Last month, three similar notes were found at HPHS.

Parents, please talk with your children about how seriously any threats, written or otherwise, are taken on campus.

We will continue to keep you informed.

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