(Portland, OR)  --  A commercial building in the Madison South Neighborhood was destroyed by fire early Tuesday morning.  The 20-thousand square foot building in northeast Portland contained a boarded-up restaurant and an Asian market.  Smoke was pouring from the restaurant when firefighters arrived. Flames broke through the roof and three alarms were called.   After 90 minutes the fire was controlled.  There were no injuries.  The investigation into the cause of the fire is ongoing.