Authorities hold a news conference after reports of an active shooter at a King Soopers supermarket in Boulder, Colorado.
Police in Boulder, Colorado, armed with protective gear and rifles were responding to reports of an active shooter at a King Soopers supermarket Monday afternoon.
It wasn't clear whether there have been any injuries or fatalities. The Boulder Daily Camera said at least one person has been hospitalized, and citing police radio traffic, the newspaper reported one person has been taken into custody.
The Boulder Police Department at 2:49 p.m. local time tweeted an alert for people to stay away from the area around the supermarket.
At one point, authorities were heard over a loudspeaker telling someone the building was surrounded and “you need to surrender” and come out with hands up and unarmed.
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