(Portland, OR)  --  TriMet officials say there were no injuries following a minor collision between one of its buses and the San Antonio Spurs' team bus in downtown Portland.  The transit agency says the Spurs' bus was on its way to the Moda Center for last night's Blazers-Spurs game when the fender-bender took place.  The crash happened at Northwest Fifth Avenue and Everett Street.  The Spurs' arrival at the Moda Center was delayed by about 15 minutes.