Smoke was visible to responding fire companies several blocks away- and was pouring from the 2-1/2-story structure east of Prospect and on the south side of The Avenue when fire crews arrived minutes later.
Three more fire companies were ordered.
A 2nd-alarm was struck at 1:15 p.m.- and at least 5 more fire companies responded.
The fire was in an old building that once housed the Vista movie theater and been transformed into shops in the 1960's.
There has been no reports of anyone found inside- or any other firefighter injuries.
It took nearly 2 hours using 4 ladder streams and other heavy fire-fight equipment to bring the fire under control.