(Portland, OR)  --  Police say they've made another arrest in connection to a massive May Day brawl outside Cider Riot in northeast Portland.  The U.S. Marshals Service arrested 29-year-old Mackenzie Lewis yesterday on a riot charge.  He's accused of taking part in a large fight involving roughly 60 people on May 1st at Northeast 8th Avenue and Couch Street.  On Tuesday, police arrested Christopher Ponte in connection to the riot after he turned himself in to authorities.  Police arrested Ian Kramer and Matthew Cooper last week for allegedly hitting a woman with a baton and knocking her unconscious during the riot.  The alleged assault was partially recorded on video.