Police in Boulder, Colorado, on Monday (March 22) reported an “active shooter” at a King Soopers grocery store, but no further official details were available in the Twitter alert, and it was not immediately known whether shots had been fired.
Live aerial video footage of the scene broadcast by a local television station showed police massing outside the store, along with at least two ambulances.
According to a police Twitter alert, the situation was unfolding in the Table Mesa neighborhood of Boulder, a city located at the base of the Rocky Mountains foothills about 28 miles northwest of Denver.
Table Mesa is home to the hilltop laboratory of the National Center for Atmospheric Research.
(Production: Deborah Gembara)