(PUEBLO COUNTY, Colo.) — The Pueblo County Sheriff’s Office (PCSO) said it is working with the FBI and Pueblo School District 70 (D70) to investigate what is believed to be a swatting incident that led to the closure of three D70 schools on Monday, April 21.

On Sunday, April 20, a message containing threats to students and teachers of D70 was allegedly sent to people, prompting the schools to close on Monday. D70 said that, after an investigation, it was determined to be a case of swatting. D70 also said investigators have confirmed that at the current time, no student from the district was responsible for the threat, and it was deemed non-credible.

PCSO said swatting is a false emergency call aimed at causing a law enforcement response. The threat appeared to come from out of state, but it was made to appear to come from a D70 student.

“The safety of our school community remains our top priority, and we take all threats seriously. Out of an abundance of caution for the safety of District 70 students and staff, Sheriff Lucero, Pueblo County Sheriff’s deputies, and Colorado State Patrol Troopers searched the affected schools and all were deemed safe,” said Ronda Rein, Superintendent.

PCSO said it is working with the FBI to investigate the swatting incident. Additionally, PCSO said there will be a substantial presence of law enforcement in and around the schools. PCSO has partially activated the Emergency Operations Center and is remotely monitoring the school buildings via security cameras.

“We do not believe that there is a threat to our community,” said Sheriff David J. Lucero.