No injuries and no deaths reported at Boulder High School as police investigate reports of an active shooter

Updated 3:23 p.m.

There are no injuries and no deaths reported at Boulder High School, police said after responding to reports of an active shooter.

Boulder Police Chief Maris Herold said there’s no proof the initial caller, who said he was carrying semi-automatic weapons and was ready to enter Boulder High, was ever on campus.

The call came to the CU Police Department’s dispatch center on a non-emergency number at 8:33 a.m. There was a slight delay in response as Boulder Police wasn’t the agency that received the initial report.

Herold said she listened to the initial emergency call herself and heard shots fired in the background, leading to the response.

"The way this call came in really was authentic to make you believe that we had a real active shooter in front of Boulder High School," Herold said during a press conference in front of Boulder High.

The school and its surrounding area, less than a mile away from Pearl Street, were placed on lockdown. 

The University of Colorado Boulder, which is close to Boulder High’s campus, issued an emergency alert saying police are investigating a report of a person with a gun.  

Boulder High is on a planned delayed start schedule, with the campus mostly occupied by teachers doing administrative work. Classes weren’t scheduled to start until 9:45 a.m.

The perceived threat at Boulder High is among multiple that police are investigating statewide. 

Brighton Police were investigating a “threatening call from an unknown person” at Brighton High School but did not find it credible. Aspen School District was also briefly on lockdown as the Pitkin County Sheriff’s Office investigated reports of shots being fired in the vicinity. All schools were later cleared of the threat.

Police deemed a threat against Cañon City High School a “false report.”

Herold said she doesn't have the full details, but speculated the threats were connected due to all of them happening in a relatively short timeframe.

"It appears, though within short order, schools across the state of Colorado received a call," she said. "It seems like it was a systematic way of calling schools."

This is a developing story and will be updated.