BOULDER COUNTY, Colo. - Niwot High School in Boulder County was closed Friday while authorities investigate a threat to blow up the school and a "hit list" with 30 students' names on it.
Parents told 7NEWS that the threat to blow up the school was found scrawled on a bathroom wall on Monday.
On Thursday, a second written threat was found with the "hit list."
In a letter sent to parents Thursday night, school officials said the school was being closed while officials evaluate the threats.
"This buys us some time to investigate the threats and determine who is behind them and whether they are credible," said Cmdr. Rick Brough, spokesman for the Boulder County Sheriff's Office.
Deputies met with the parents of the students named on the list Thursday evening.
"Ten years ago this wouldn’t have been a problem, and now it’s a real problem," said Ellen Ross. "And my child’s name is on the list, and it’s very concerning."
Ross said there was no obvious connection between the students on the list.
"I just really hope that the parents talk to their kids and try to find out what is going on because some child knows," said Ross. "No child does this and doesn’t tell anybody. I really want the parents to talk to their kids and find out who’s doing this."
"It makes it real when it has your son's name on there and the kids that I have known since preschool," said mother Christina Ireland.
Principal Dennis Daly sent a memo to parents on Tuesday that said the sheriff's office and school were "taking all necessary precautions to ensure the safety of our students and staff."
"What's going on in the world today, you have to take everything serious anymore. You never know if it's a copycat or whether it's just a student that has a final on Friday that just doesn't want to take a final," Brough said.
St. Vrain Valley School District spokesman John Poynton said there is a $1,000 reward for information leading to the person responsible through the Safe-2-Tell system at 877-542-7233 (SAFE) or online at safe2tell.org.
Friday's talent show at Niwot Elementary School has been postponed.
All events scheduled for the weekend have been moved to other locations.