Updated On: 23 March, 2021 09:49 AM IST | Colorado | AP
Boulder County District Attorney Michael Dougherty said authorities know how many people were killed and suggested they are not releasing the number because they need to notify the families of the victims.

Police officers secure the perimeter of the King Soopers grocery store in Boulder, Colorado after reports of an active shooter. Pic/AFP
A shooting at a Colorado supermarket killed 10 people Monday, including a police officer who was the first to respond to the scene, authorities said.
Police arrested a suspect, but didn't reveal his name or any details about the shooting at an evening news conference where Boulder police Chief Maris Herold fought back tears.