(Portland, OR) -- An investigation is ongoing into an officer-involved shooting in Southeast Portland. Police say the shooting happened Saturday night when officers tried to make a traffic stop and the suspect fled. Officers used an intervention technique to stop the vehicle, and it crashed near Southeast 88th and Holgate, where shots were fired. The suspect was believed to be armed. After several hours of negotiations, the suspect was taken into custody and treated at a hospital. Police have not said whether the person was shot. The suspect is expected to survive.