Police share another instance of mass killing where a gunman killed at least ten people comprising a police officer at a grocery store in Colorado.

The shooter who has been arrested was injured, shared Michael Dougherty, district attorney for Boulder County, situated 30 miles northwest of the state capital, Denver.

The police chief Maris Herold said that among those dead was “heroic” police officer Eric Talley, 51, who at first responded to the scene at a King Soopers supermarket.

“We know of 10 fatalities at the scene, including one of our Boulder PD officers… Officer Tally responded to the scene — was first on the scene — and he was fatally shot,” shared Herold.

The live-streamed video displayed a white, middle-aged man shirtless and apparently smeared in blood, detained by police and led from the supermarket.

The suspect in custody was the only person who had “serious injuries at this point,” said police commander Kerry Yamaguchi; however, it did not confirm that the man in the video was the suspect or any potential motive.

White House Press Secretary Jen Psaki tweeted that President Joe Biden was briefed on the shooting. Last month, a meeting was called to enact “commonsense” gun law reforms between the president and the Congress.

Majority leader Chuck Schumer expressed that the Senate “must and will move forward on legislation to help stop the epidemic of gun violence.”

“My heart is breaking as we watch this unspeakable event unfold in our Boulder community,” mentioned Colorado governor Jared Polis, saying that the incident is a “senseless tragedy.”

Police officer Herold said that they responded to phone calls of shots fired in the area, and with the news, there could be a person with a patrol rifle around 2.30 pm local time (1830 GMT).

Eyewitnesses inside the supermarket shared that they heard several gunshots before fleeing through a back entrance.

“I just nearly got killed for getting a soda and a bag of chips,” Ryan Borowski, who was in the store when he overheard at least eight gunshots”, he told CNN.

“It felt amazing that everybody was helping each other out and that our instincts were on the same page, and we ran… I don’t know why other people didn’t, and I’m sorry that they froze. I wish that this just didn’t happen.”

There are unverified early images live-streamed by an eyewitness that displayed at least three people lying on the ground both inside and outside the store before multiple new gunshots rang out.

Dozens of bulletproof vehicles, ambulances and armed personnel, including FBI agents and SWAT teams, were positioned at the scene.

“Police officers’ actions fell nothing short of being heroic,” mentioned Herold, adding the “very complex investigation” would take at least five days to complete.

“Our hearts are broken over this senseless act of violence,” mentioned King Soopers spokeswoman Kelli McGannon, admiring “first responders who so bravely responded to these acts of violence.”

It is unfortunate to see another mass shooting after last week instance at Asian-owned spas in Georgia’s southeastern state that lead to the death of eight people.

President Biden mentioned last month he wanted Congress to pass laws requiring background checks on all gun sales and prohibit stabbing weapons and high-capacity magazines.

“This administration will not wait for the next mass shooting to heed that call,” Biden mentioned.