Authorities in Boulder, Colorado, warned residents Monday about an active shooting at a grocery store.
Police did not immediately say if there were any victims.
A witness, Dean Schiller, said he was going grocery shopping when he heard gunfire at the store and saw three people apparently injured. One was outside the store. The other two were inside.
An employee of the store told him there was a shooter inside.
Live video from outside the supermarket – a King Soopers south of Boulder – showed SWAT vehicles and more than a dozen police officers in tactical gear and camouflage entering the store. It looks like some of the front windows have been smashed.
At one point, a man in handcuffs could be seen leaving the store at the authorities. It was not clear if the man, who had no shirt and blood over his leg, was a suspect.
A few minutes later, a series of people could be seen who were apparently inside the store, surrounded by officers.
Jared Polis, governor of Colorado, said he was “watching the situation closely” and added that “prayers with our fellow Colorado dancers are in this time of sadness and grief as we learn more about the extent of the tragedy.”
Aerial photos of the NBC subsidiary KUSA have a large police and medical emergency services present outside the King Soopers store.
This is an evolving story. Check back for updates.