Story highlights Two others in critical condition are improving

Dallas mayor lauds "incredible police work"

(CNN) A Dallas police officer died Wednesday morning, a day after he and a colleague were shot at a Home Depot, police said.

Officer Rogelio Santander, a three-year police veteran, passed away at 8:11 a.m.

"We ask that you please continue to pray for Officer Santander's family and our department as we all try to cope with this tragic loss," police said on the department blog.

Officer Crystal Almeida and store loss-prevention officer Scott Painter also were shot in the Tuesday incident. They remain in critical condition, but are improving.

"Prayers for their recovery are still appreciated," police said. "Thank you to our community and everyone at Presbyterian Hospital for your love and support during this time."

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