AROUND 2:30 AM FD ON SCENE W/A FULLY INVOLVED BLDG FIRE COLLAPSE OF THE EXP 1 WALL MAYDAYS TX FOR 3 F.F. 1 FF W/A SERIOUS BACK INJ. STILL HOSPITILIZED 1 FF RECIEVED 6 STICHES 1 FF VERY MINOR INJ. SPEEDY RECOVERY BROTHERS..