Published: Oct 26, 2010 8:22 PM EDT
Updated: Oct 26, 2010 5:22 PM EDT

ORLANDO, Fla. (AP) - Authorities say three central Florida fires that ignited over the weekend were intentionally set.

Authorities on Tuesday weren't sure the blazes were set by one person. They said all the fires were close in proximity and time.

Sunday's first blaze was at a small, abandoned wooden structure. A firefighter was treated at a hospital for heat exhaustion. A short time later an unoccupied house was ablaze and then a mobile home at a hunting camp was in flames. No one was injured in that fire.