(Portland, OR)  --  Investigators are trying to find out what started a garage fire that spread to two nearby homes in Southeast Portland.  The blaze was reported around 8:15 last night in the 76-hundred block of Southeast 66th Avenue.  One of the homes was vacant, and the fire had spread to the attic before it was extinguished.  There was some exterior damage to the second home.  No one was injured.