0335 hours. The Central Islip Fire Department was dispatched to a report of a house on fire at 10 South Road. Units arrived to find heavy fire venting out of a single story wood frame vacant dwelling. Crews made a quick push on the interior but due to the instability of the structure, crews were pulled out and an exterior attack was mounted. Mutual aid was requested from Hauppauge for a RIT, East Brentwood to cover and Islip Terrace to the scene. An excavator was brought in from the Town of Islip to demolish the building. Once that was done, the fire was fully extinguished.