PORTLAND — Police in Portland say an officer shot a man who was a pointing a gun at passing cars on an Interstate 84 offramp Monday in Northeast Portland. The freeway was closed for about four hours during the incident and investigation but has been reopened.Sgt. Pete Simpson says the man ran from the freeway after he was struck by a bullet, and he collapsed on a nearby street. Police negotiators got the man to surrender, and he was taken to a hospital with an injury that’s not considered life threatening. He has not been identified.The man’s uncle told KOIN-TV that his nephew has mental health issues.Interstate 84 was closed in both directions near Northeast 122nd Street while police investigated the incident. The closure caused traffic backups on the highway and led to congestion on other arterial highways and city streets. Simpson says people had called 911 to report that the man appeared to be trying to carjack drivers on the ramp. Police haven’t said if the man’s gun was real or a replica.The Portland Police Bureau had asked residents in the area to shelter-in-place. The agency’s Special Emergency Reaction Team and the Crisis Negotiation Team responded to assist.