This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

GARY, Ind. — A security guard was shot and killed Friday afternoon in Gary outside of a bank prior to an armed robbery.

Lake County Sheriff’s deputies responded to First Midwest Bank, located in the 1900 block of West Ridge Road, Friday afternoon on the report of a shooting.

Police said a security guard was ambushed then shot and killed outside of the bank. Two men, armed with a rifle and handgun, entered the bank and demanded money after the shooting.

Sources told WGN News that the security guard killed is a retired employee of the Cook County Sheriff’s Office. He was identified as a Richard Castellana.

At around 3:55 p.m., several officers sped away from the bank and headed toward a wooded area in Gary. After searching in the brush for a few minutes, they took one of the suspects into custody.

Officers are still looking for the second suspect.

First Midwest said they are working closely with law enforcement and said their thoughts and prayers go out to the slain security guard’s family.

“I would like to offer my deepest heartfelt condolences to the family and friends of the security officer who was killed,” Lake County Sheriff Oscar Martinez said.

Anyone with information can leave an anonymous tip to the FBI.