(Portland, OR)  --  Portland police say six people have been arrested following a party that got out of hand after it was publicized through a Facebook post.  Authorities say they began fielding 911 calls around 1:30 yesterday morning about a rowdy party in the 300 block of Northwest 88th Avenue.  Police say the host of the party, 19-year-old Payton Smith, was arrested on a charge of furnishing alcohol to minors.  Officials say there were reports of shots fired at the party, and two juveniles who were arrested were found to be carrying brass knuckles and a gun.