(Portland, OR) -- Four people are injured after being stabbed during a pop-up rave early Saturday morning. It happened on the East Bank Esplanade at Southeast Salmon Street in Portland. Police say there were several fights during the party. Nineteen-year-old Peter Chalukian, of Hillsboro, allegedly stabbed three people. Chalukian was also stabbed. He was one of two people hospitalized with non-life-threatening injuries. The two other victims only needed stitches. Chalukian was arrested for assault after being released from a hospital.