Boulder, Colorado | A gunman opened fire at a supermarket in Boulder, Colorado, on Monday (Tuesday AEDT), killing 10 people, including a policeman, before being arrested, marking the second deadly US mass shooting in less than a week.
Police gave few immediate details of the shooting and no known motive for the violence, which unfolded at about 3pm at a King Soopers grocery store in Boulder, about 45 kilometres north-west of Denver.
