UPDATED: 5/10/2013 3:35 p.m.

CHICAGO (CBS) — FBI agents shot and killed a suspect and arrested two others at a bank in far northwest suburban Richmond on Friday, authorities said.

FBI Special Agent Frank Bochte confirmed agents were involved in a shooting outside the Associated Bank branch at 10910 N. Main St. in Richmond, less than a mile from the Wisconsin state line.

The FBI said agents had the three suspects under investigation before the shooting happened on Friday morning, Special Agent Joan Hyde. She would not elaborate on why the group was being followed.

Aaron Russell, 40, of 9200 Hunter Drive, Orland Hills, IL, and Roberto Favela, 34, of 5547 South California Avenue, Chicago, were charged with one count of attempted bank robbery, a felony offense. The third suspect, Tony Starnes, 45, of 7836 South Marquette Avenue, was killed during the robbery attempt.

The FBI agents encountered the three individuals in the bank parking lot and shots were exchanged, Hyde said. No agents were injured in the shooting.

Witnesses reported dozens of police vehicles on the scene.

An employee at the NAPA Auto Parts store across the street said, around 11:30 a.m., he heard what he thought were fireworks.

“Just was working at the counter, and then heard a whole bunch of gunshots, looked across the street, saw the car speeding across, hit a light post, knock that over, and then the cops swarmed in on them,” he said in a phone interview.

He said the store remained open after the shooting, but most of the roads are blocked off.

“Nobody can come in and out, because [Main Street] is closed down,” he said. “We do a couple deliveries out; we’ve got a back street right on us, but it’s just packed with traffic, so it takes forever to get a mile down the road.

An employee at Richmond Canvas, a boat cover supplier down the street from the bank, said she noticed what appeared to be an unmarked car in the parking lot for about half an hour before the shooting.

Shortly before the shooting, a second unmarked car pulled up, and they both sped into a neighboring parking lot, surrounding a car that had its doors open, she said.

Then she heard gunshots, and ducked for cover.

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