Timeline: Major US mass shootings in the past decade

A list of major mass shootings in the United States in recent history.

A mass shooting at a supermarket in Boulder in the US state of Colorado on Monday has left 10 people dead, including a police officer. Police gave few immediate details of the shooting, which occurred within a week of the shooting and killing of eight people, including six Asian women, in the state of Georgia. Monday’s shooting unfolded at about 3pm at the King Soopers grocery store in the Table Mesa area of Boulder, a city northwest of Denver.