SWAT teams search school in Boulder

Police searched a high school room by room after a cook reported seeing two suspicious men in the building around dawn, both wearing camouflage and one in a ski mask.

Authorities said no classes or groups were meeting in Boulder High School at the time. Police sealed off the building, and school officials canceled classes for the day.

A four-hour search by three SWAT teams found no signs of a break-in or any intruders, Police Chief Mark Beckner said. The search included utility-access tunnels under the building, and at one point two officers could be seen on the roof, their rifles pointed downward.