(WGN-AM) - Three people suspected of robbing a bank Tuesday afternoon and shooting a Calumet City police officer while exchanging gunfire are in custody, police said at a news conference.

As Calumet City police pursued three people onto the Bishop Ford Freeway, the suspects' vehicle struck the center wall near 130th Street and the forest preserve.

The suspects exited the car and exchanged gunfire with police, striking one officer, Illinois State Police Sgt. Juan Valenzuela said. One suspect was arrested at the scene, but the other two fled into the woods.

Police say the other two suspects were caught as they tried to hide in the nearby Beaubien Wood's Forest Preserve.

One of the suspects emerged from the woods with a gun and had been shot, said Calumet City Police Chief Edward Gilmore.

Larry Langford, a Chicago Fire Department spokesman, said his department's paramedics were treating one of the arrested suspects for an arm injury.

Officers initially responded to a robbery at a Citibank branch, 1779 River Oaks Dr., Valenzuela said.

Someone from inside the bank called and alerted police on their cell phone before an alarm was sent out notifying police of the robbery, Gilmore said. It is not clear if that person was an employee of the bank or a customer, Gilmore said.

Several police from area stations assisted Calumet City police on the robbery call, Gilmore said.

The third suspect was caught by Burham Police at 142nd Street and Manistee Avenue near the forest preserve, Gilmore said. Burham police "are confident they have the right person," Gilmore said. Gilmore said the suspect showed "clear signs" of hiding out in the woods.

The injured officer was shot in the leg and is being treated at a local hospital, police said.

(The Chicago Tribune contributed to this report)

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