Ten people, including a police officer, were killed in a shooting that took place Monday at a grocery store in Boulder, Colorado.

Ahmad Al Aliwi Alissa, the 21-year-old suspect, is in custody and charged with 10 counts of first-degree murder.

Witnesses say a person came into the King Soopers grocery store at 3600 Table Mesa Drive and began shooting. Police were dispatched to the scene at approximately 2:40 p.m. MT (4:40 ET), and they entered the store and engaged the suspect, Boulder Police Chief Maris Herold said. Herold said gunfire was exchanged, the suspect was shot in the leg and some officers were injured.

Conrad Wright leaves flowers at the scene on Tuesday, the day after the shooting.
Conrad Wright leaves flowers at the scene on Tuesday, the day after the shooting.
Alyson McClaran/Reuters
Caution tape stretches along a makeshift fence Tuesday that was put up around the store's parking lot.
Caution tape stretches along a makeshift fence Tuesday that was put up around the store's parking lot.
David Zalubowski/AP
Police officers salute as a fellow officer's body is driven away from the scene on Monday night. Boulder Police Chief Maris Herold said <a href="https://www.cnn.com/2021/03/23/us/boulder-officer-killed-talley-profile/index.html" target="_blank">Officer Eric Talley,</a> 51, had been with the department since 2010. He was one of the first officers at the scene, she said.
Police officers salute as a fellow officer's body is driven away from the scene on Monday night. Boulder Police Chief Maris Herold said Officer Eric Talley, 51, had been with the department since 2010. He was one of the first officers at the scene, she said.
Michael Ciaglo/USA Today Network/Sipa USA
A Colorado state trooper salutes as Talley's body is taken away from the scene.
A Colorado state trooper salutes as Talley's body is taken away from the scene.
Chet Strange/Getty Images
Police investigate the scene of the shooting.
Police investigate the scene of the shooting.
David Zalubowski/AP
Police units were dispatched to the scene at approximately 2:40 p.m. MT, according to Boulder Police Chief Maris Herold.
Police units were dispatched to the scene at approximately 2:40 p.m. MT, according to Boulder Police Chief Maris Herold.
Chet Strange/Getty Images
A man and woman kiss near the scene on Monday.
A man and woman kiss near the scene on Monday.
Hart Van Denberg/Colorado Public Radio/AP
Police lead a handcuffed man, bleeding from his leg and dressed only in underwear, away from the scene of the shooting on Monday. The handcuffed man is shooting suspect Ahmad Al Aliwi Alissa, <a href="https://www.cnn.com/us/live-news/boulder-colorado-shooting-3-23-21/h_4b8ba302da2648a8ab2f2640ae52a0f8" target="_blank">his brother confirmed to CNN.</a> Alissa, 21, is a resident of Arvada, Colorado, a suburb of Denver.
Police lead a handcuffed man, bleeding from his leg and dressed only in underwear, away from the scene of the shooting on Monday. The handcuffed man is shooting suspect Ahmad Al Aliwi Alissa, his brother confirmed to CNN. Alissa, 21, is a resident of Arvada, Colorado, a suburb of Denver.
Dean Schiller/ZFG Videography
Shoppers are led to safety by police.
Shoppers are led to safety by police.
Michael Ciaglo/USA Today Network
Police work outside the grocery store.
Police work outside the grocery store.
Joe Mahoney/AP
Sarah Moonshadow is comforted by David and Maggie Prowell after the shooting. Moonshadow was inside the store during the shooting.
Sarah Moonshadow is comforted by David and Maggie Prowell after the shooting. Moonshadow was inside the store during the shooting.
Alyson McClaran/Reuters
Police gather at the scene.
Police gather at the scene.
David Zalubowski/AP
A police officer checks cars in the area.
A police officer checks cars in the area.
Chet Strange/Getty Images
People are led out of the store by police.
People are led out of the store by police.
Hart Van Denburg/Colorado Public Radio/AP
Women hug on the corner of Broadway and Table Mesa Drive.
Women hug on the corner of Broadway and Table Mesa Drive.
Joe Mahoney/AP
A woman stands with police near the scene.
A woman stands with police near the scene.
Matthew Jonas/Boulder Daily Camera/Getty Images
Police use an armored vehicle as a shield to move from one side of the building to the other.
Police use an armored vehicle as a shield to move from one side of the building to the other.
Matthew Jonas/Boulder Daily Camera/Getty Images
Starbucks employees are helped away from the scene.
Starbucks employees are helped away from the scene.
Matthew Jonas/Boulder Daily Camera/Getty Images
Police officers respond to the scene.
Police officers respond to the scene.
Helen H. Richardson/MediaNews Group/The Denver Post/Getty Images
Shoppers are escorted to safety.
Shoppers are escorted to safety.
Chet Strange/Getty Images
Police officers rush to surround the grocery store.
Police officers rush to surround the grocery store.
Matthew Jonas/Boulder Daily Camera/Getty Images
Health-care workers and shoppers are tended to after the store was evacuated.
Health-care workers and shoppers are tended to after the store was evacuated.
Chet Strange/Getty Images
SWAT team members descend from the roof of the store.
SWAT team members descend from the roof of the store.
Chet Strange/Getty Images
A SWAT team member runs toward the store.
A SWAT team member runs toward the store.
Chet Strange/Getty Images
Two police officers embrace each other at the scene.
Two police officers embrace each other at the scene.
Michael Ciaglo/USA Today Network
People observe the response behind police tape.
People observe the response behind police tape.
Jason Connolly/AFP/Getty Images
An ambulance leaves the store's parking lot.
An ambulance leaves the store's parking lot.
Jason Connolly/AFP/Getty Images
Police officers walk through the parking lot after responding to the scene.
Police officers walk through the parking lot after responding to the scene.
Jason Connolly/AFP /Getty Images
First responders work at the scene.
First responders work at the scene.
David Zalubowski/AP