A shooting at a crowded Colorado supermarket that killed 10 people, including the first police officer to arrive, sent terrorized shoppers and workers scrambling for safety and stunned a state that has grieved several mass killings.
Ryan Borowski, one of the people inside the King Soopers grocery store when a shooter starting firing shots, said everyone helped each other get out of the back of the store.
But police confirmed it had reached double figures late on Monday night. It is not clear whether or not that man is a suspect in the shooting.
Asking what appears to be a store employee whether a shooter went into the store, the man responds, "Yeah, he went in there".
Paramedics placed him on a stretcher before he was lifted into the back of an ambulance and accompanied by police.
It was the deadliest shooting in Colorado since the Columbine High School massacre in 1999, in which two young killers murdered 12 students, one teacher and injured other 21 people. Atlanta Police Chief Rodney Bryant said three people were killed at a spa in northeast Atlanta, while a fourth person was killed at another spa across the street.
Ms Herold did not provide further details about the shooting, but said that the investigation was "very complex" and would take "no less that five days to complete".
"We do have a person of interest in custody, that person was injured during the incident, and is now being treated for their injuries", Yamaguchi added.
"Today our community experienced a senseless act of violence that caused an unnecessary loss of life in Boulder's vibrant community".
Boulder District Attorney Michael Dougherty told media that Talley was "by all accounts, one of the outstanding officers of the Boulder Police Department". Matthew Kirsch, the acting US attorney for Colorado, pledged that "the full weight of federal law enforcement" will support the investigation. I don't know why other people didn't, and I'm sorry that they froze.
Multiple law enforcement agencies have reached out to the Boulder Police Department to express their condolences and show their support for the agency.
Heavily armed police approach the store. "AVOID THE AREA" on their Twitter page. Social media has also been sharing images of a shirtless white man with a beard being escorted by police. His right leg - from his knee down to his foot - were covered in what looked like blood.
"Like my fellow Coloradans, I am closely watching unfolding events.in Boulder", tweeted Colorado Governor Jared Polis.
Witness James Bentz told the Post that he was in the meat section when he heard what he thought was a misfire, then a series of pops. "I didn't see anything; I could just hear... and I just ran - I just wanted to get out of there".
The suspect was "significantly" injured according to officials.