BREAKING NEWS
NBC News and news services
Updated: 18 minutes ago
BOULDER, Colo. - A high school was closed for the day on Thursday, shortly after being locked down amid unconfirmed reports that two masked men were seen entering the building.

Officers from various law enforcement agencies could be seen outside Boulder High School, and the entrances to the parking lot and the building were blocked off.

NBC affiliate KUSA reported that a SWAT team responded to the school after a school worker reported seeing two men in camouflage with ski masks inside the building.


The Boulder Valley School District Communications Director, Briggs Gamblin, said a cafeteria worker arrived at work Thursday morning and saw two men inside the school wearing camouflage gear with ski masks.

Gamblin adds that there are no reports of weapons but the worker contacted both police and district officials.

Classes normally begin at 7:30 a.m. but were delayed until 10 a.m. so authorities could conduct a sweep of the building. Officials closed it for the day shortly after that.

Boulder Police spokeswoman Julie Brooks confirmed that authorities were on the scene, but she released no further details.

Messages left with the principal and the school district were not immediately returned.

The school is blocks from the University of Colorado campus