(Portland, OR) -- A federal investigation is underway after federal immigration agents shot and injured two people in Portland. Portland Police Chief Bob Day says his officers are providing support to the FBI for its investigation into Thursday's shooting. Portland Police say officers responded to the shooting outside of a medical clinic, and six minutes later, they got a call from a man who had been shot. Officers found a man and a woman in a car with gunshot wounds. Officers applied tourniquets until medics arrived and the two people were taken to a hospital. Homeland Security claims agents were making a traffic stop on suspected Venezuelan gang members when the driver tried to run down an agent and shots were fired.