Guam - The Guam Fire Department spent nearly ten hours battling a structure fire that broke out at the National Office Supply in Barrigada.  GFD was called just after 5:45 this morning and found the 2nd Floor fully engulfed in flames.  Agency Spokesperson Joey San Nicolas says firefighters had to break their way into the building. 

While fire sprinklers went off inside the building, they were hardly enough to contain the fire that spread rapidly. National Office Supply owner Emelio Uy says he intends to rebuild the facility, telling KUAM News, "So far, what I was just hoping is that our customers would just move on and continue patronizing us by going to the Tamuning store and to the Harmon store."

The fire department was able to get the blaze under control and fully extinguished around 4 o'clock this afternoon.  Four firefighters were treated for heat exhaustion.  Meanwhile, an investigation has been launched into the cause of the fire.