Portland police reported projectiles were thrown at them by protestors before a shooting was reported on Morrison Bridge in the centre of city.
In a statement, police have described the victim’s injuries as non-life-threatening and said he is being treated in hospital.
Police have described the possible suspect as a thin man in his late teens, 5ft 8in, wearing a black hoodie and saggy blue jeans.
An eyewitness to shooting, local community activist Cameron Whitten, told OregonLive protesters were moving westbound over the bridge when a car with multiple occupants drove onto the bridge travelling eastbound.
The 25-year-old activist said the car’s multiple occupants got out and one of them, armed with a gun, shot in the air before shooting a demonstrator in the lower body.
In response, police cleared the bridge and set up a crime scene guarded by officers in riot gear.
Portland Police are calling for any witnesses to come forward with information and contact them via their non-emergency line at 503-823-3333.
He said on Twitter on Thursday: “Just had a very open and successful presidential election. Now professional protesters, incited by the media, are protesting. Very unfair!”.
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