(Portland, OR)  --  Police are on the lookout for a suspect accused of shooting two teenagers at a house party in Southeast Portland.  Police say someone called 9-1-1 Saturday night to report gunfire at a large house party near Southeast 90th and Duke Street.  Officers arriving at the scene found a juvenile boy and a juvenile girl had both suffered gunshot wounds.  The juveniles are both expected to recover.  Investigators believe the incident was gang-related.