An investigation into a bomb threat at Steamboat Springs High School is ongoing, Superintendent Donna Howell said.
At about 7 a.m. Friday, high school principal Mike Knezevich found a statement involving a bomb threat in one of the bathrooms.
The bomb threat was for the end of next week.
Howell said the Steamboat Springs Police Department has been contacted.
"You can never take anything lightly," Howell said. "We are really taking this quite seriously."
The students were informed of the threat Friday morning, and Howell said the school was sending a letter home to parents.
"At this point we aren't giving any more information," Howell said.
Two police officers were at the high school Friday conducting an investigation and interviewing students, Steamboat Springs police Capt. Joel Rae said.
"I'm not releasing the details of what the threat was specifically," Rae said. "We don't want to compromise the investigation taking place right now."
The police department did not believe there was a safety threat at the high school Friday, which is why the school was not closed, Rae said.
Classes are scheduled for Monday.
"We are continuing as normal as we can continue," Knezevich said. "We are very aware and available for kids or parents if they have questions."
Investigators are looking into the last time the bathroom where the statement was issued was used, but Knezevich declined to say which bathroom was used to make the bomb threat.
Police are investigating a time frame between Thursday afternoon and 7 a.m. Friday. There are no surveillance cameras at the bathroom's entrance.
The high school hosted a volleyball match Thursday night between Steamboat and Battle Mountain, which is based in Eagle-Vail. Knezevich said those matches started at 4:30 p.m. and ended at approximately 9 p.m.
Rae said there have been no bomb threats at any other district building or school.
Last spring, a high school student brought an oversized firecracker to school and deployed it on an open field south of the school, but no one was injured. There have been recent threats of violence in Front Range schools, which Rae has seen, as well as the school shooting in Bailey last month.
"The bottom line is we have to take this serious and do everything," Rae said.
Anyone with information is encouraged to call Routt County Crime Stoppers at 870-6226. Callers will remain anonymous.
"We are encouraging students to come forward," Rae said.