Update: Monday, 3/22/2021- 9:32 p.m. EST

At least ten people have died in a mass shooting on Monday at a supermarket in Colorado including a police officer, multiple outlets reported.

Boulder Police say there are multiple fatalities in Boulder, including a police officer.

— Astrid Martinez (@astridtv1) March 23, 2021

A line of police cars from around the metro area here, likely to escort the body of the fallen Boulder Police officer. #9news pic.twitter.com/pc2og7tRzV

— Steve Staeger (@SteveStaeger) March 23, 2021

Law enforcement took a man into custody and he was treated for his injuries.

Police: No ongoing public threat. Person of interest in custody. He was injured and is being treated for his injury.

— Boulder Police Dept. (@boulderpolice) March 23, 2021

The Boulder Police Department held a second press conference to update the public.

#BOULDERSHOOTING Updated information, live press conference https://t.co/00999WftkY

— Boulder Police Dept. (@boulderpolice) March 23, 2021

According to police, ten people were killed including Boulder Police Officer Eric Talley.

Chief: Our hearts go out to all families impacted. There are 10 fatalities. She identified slain Police Officer Eric Talley, who was one of the first on the scene. She calls officer’s actions “heroic.”

— Boulder Police Dept. (@boulderpolice) March 23, 2021

Rest In peace Officer Eric Talley. Your service will never be forgotten #BoulderShooting pic.twitter.com/FVximvhS2E

— Boulder Police Dept. (@boulderpolice) March 23, 2021

This is a developing story. Check back for updates. 

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Police in Colorado have responded to an “active shooter” at King Soopers grocery store in Boulder on Monday, according to reports.  

ALERT: Active Shooter at the King Soopers on Table Mesa. AVOID THE AREA. PIO is en-route.

— Boulder Police Dept. (@boulderpolice) March 22, 2021

Officers told ABC News that they responded to reports that someone was shot in the parking lot and fired upon by a suspect when they arrived at the scene.  

Please avoid the area of Table Mesa & Broadway! This is still a very active scene. Do NOT broadcast on social media any tactical information you might see #BoulderShooting 1/2 pic.twitter.com/JE214XS86B

— Boulder Police Dept. (@boulderpolice) March 22, 2021

A live video feed showed a shirtless man with blood on his leg being escorted out of the store in handcuffs.

Suspect in custody | BREAKING | Active shooter reported at grocery store in Colorado. Stay with BNC for updates. https://t.co/mpKQ1GrIAn pic.twitter.com/VDSKcCO7CU

— BNC (@BNCNews) March 22, 2021

Governor Jared Polis tweeted about the shooting calling it a “tragedy.”

Like my fellow Coloradans, I am closely watching unfolding events at King Soopers in Boulder. My prayers are with our fellow Coloradans in this time of sadness and grief as we learn more about the extent of the tragedy.

— Governor Jared Polis (@GovofCO) March 22, 2021

It is still unclear if any people were injured or killed.

This is a developing story. Check back for updates