At least ten people have been killed in an unidentified shooting in Boulder, Colorado. Among those killed was a police officer.
The shooting happened in a supermarket. Police have arrested a suspect.
Police say the shooting took place at the King Supermarket, which used an AR-15 rifle.
According to the news agency, the motive of the shooter has not been known yet.
The suspect was taken into custody, but there were few answers in the following hours. Officials said it would take days to investigate the large crime scene and to notify families that their loved ones had been killed.