LOUISVILLE, Ky. (WDRB) -- There is frustration, anger and concern in Clarksville, Indiana after a series of bogus threats in the community's school system. 

"It was written on the bathroom wall, and it said a bomb was going off at 2 p.m.," said Shelena Rak, the grandparent of a students at Clarksville middle and High Schools.

Students rushed out, police and fire rush in, and in the end, it was all a hoax.

"It's very frustrating," said Kim Knott, Superintendent of the Clarksville Community School Corporation. "We take these threats very seriously."

The scenario played out twice at Clarksville High School, and most recently, Wednesday at Clarksville Middle School, forcing three evacuations in less than two weeks in a district that only has three schools. 

"It goes without saying the safety of our students and staff is the first priority," Knott said.

Knott said all of the suspects are students -- and she called the later two incidents copycats of the first. 

We're told police charged one child with terrorist threatening for the first prank. That student has been expelled, and Knott is pushing for their parents to pay the bill for the emergency response.  

The Superintendent said the district has leads in the other two incidents.

"We do have suspects...and we will pursue, to the extent of the law, criminal charges," Knott said.

Clarksville has cameras all over its three schools. It's helping to guide the investigation. Knott said the district has video of the person who made the threats. 

"Kids in my day thought a prank was putting gum under a seat," said Rak. "Now it's threatening bombs or taking guns to school. It's a whole different ball game."

Like many others, Rak got emails and letters notifying her of the situation in the schools. Her grandkids live in her home. 

"My concern is not that they are in immediate danger, but that they will get immune to the violence and one day they could really be in danger," Rak said.

Prosecutors said the punishment for a student making a terrorist threat could be a fine of up to $5,000 and a year in juvenile detention.  

Clarksville police returned to campus to talk with kids again today. Officials said more arrests are expected soon. 

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