Boulder supermarket shooter ID’d

%OU/DE5, Colo. AP ² Police on Tuesday identified a 21-year-old man as the suspect who opened fire inside a crowded Colorado supermarket in an attack that killed 10 people, including an officer, and sent terrorized shoppers and employees scrambling for cover.

Authorities said Ahmad Al Aliwi Alissa was from the Denver suburb of Arvada and that he engaged in a shootout with police

Monday afternoon inside the Boulder store. The suspect was being treated at a hospital and was expected to be booked into the county Mail later in the day on murder charges.

Investigators have not established a motive, but authorities believe he was the only shooter, Boulder County District Attorney Michael Dougherty said.

The suspect’s family told investigators they believed Alissa was suffering some type of mental illness, including delusions. Relatives described times when Alissa told them people were following or chasing him, which they said may have contributed to the violence, the official told AP.

Hundreds of police from throughout the Denver area responded to the attack, converging on a King Soopers supermarket in a busy shopping plaza.

SWAT officers carrying ballistic shields slowly approached the store as others escorted frightened people away from the building, which had some of its windows shattered. Customers and employees fled through a back loading dock to safety. Others took refuge in nearby shops.

“This is a tragedy and a nightmare for Boulder County,” Dougherty said. “These were people going about their day, doing their shopping. I promise the victims and the people of the state of Colorado that we will secure Mustice.”

The other dead ranged in age from 20 to 65. They were identified as Denny Strong, 20 Neven Stanisic, 23 Rikki Olds, 25 Tralona Bartkowiak, 4 Suzanne Fountain, 5 Teri Leiker, 51 Kevin Mahoney, 61 Lynn Murray, 62 and Jodi Waters, 65.