Denver Police officers are looking for a suspect after a woman was killed and two people were injured in stabbings along the 16th Street Mall in downtown Denver.

Celinda Levno, 71, is being remembered by loved ones and members within her industry for a career that spanned decades as a flight attendant.

Celinda Levno, a 71-year-old American Airlines flight attendant, died after being stabbed during a layover in Denver. She began her career in 1989 with America West which later merged with American Airlines.

American Airlines tells PEOPLE the company is “heartbroken and mourning the tragic loss of our colleague who was the victim of a senseless crime"

A Phoenix flight attendant was among four people stabbed during a two-day rampage in Denver over the weekend. Two people were killed, including a flight attendant, 71-year-old Celinda Levno, who was on a layover.

A Phoenix-based flight attendant was the victim of a deadly stabbing on Denver's 16th Street Mall, according to her representative.