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HOUSTON (AP) - Four men have been charged in a December armored car robbery at the University of Houston.

Federal prosecutors and the FBI on Tuesday announced the arrest of three of four suspects, with detention hearings pending. All are from Houston.

Ronald Dean Richards, Dezmond Lacraig Edwards, Allen Bernard Roundtree and James Van-Gerald Johnson are charged with conspiracy to interfere with commerce by robbery and with interference with commerce by robbery. Richards remains at large.

Johnson also faces a charge of brandishing a firearm during a violent crime.

Investigators say Johnson had a pistol on Dec. 6 at the UH Student Center, where an ATM was being refilled. He allegedly forced the pregnant driver from the Loomis vehicle, jumped in and drove away - taking the cash and later switching vehicles.

Anyone with information on Richard s whereabouts is asked to contact the FBI at 713-693-5000 or Crimestoppers at 713-222-TIPS. Crimestoppers will offer a reward up to $5,000 for any information leading to his location and arrest.

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