The suspect allegedly followed an armored truck, cut off the truck and fired shots, Officer Henry Tippett said. No one was injured. The incident occurred at Evans Trail and Powder Mill Road in Beltsville at about 3:30 p.m.
An officer fired at the suspect's vehicle, shattering the driver's side window. After exchanging gunfire with police, the suspect fled in a rental car, which he ditched at Remington's Restaurant on Route 1.
The suspect barricaded himself in a house on Lexington Avenue. Police set up surveillance at a neighbor's house, and when the suspect walked out with an automatic weapon and tried to get into another house, police shot him, Tippett said.
He was taken to a local hospital where he is in stable condition with a gunshot wound to the stomach. He is under 24-hour police guard.
Police have ruled out the possibility that a second person was involved in the robbery attempt.