ELF (Earth Liberation Front) is a common perp in fires like this. FBI has been chasing them for 10+ years.
Eco Terrorists. Extreme Left nut cases. Totally wacko.
We had some attempted setting of fields afire several years ago.
Someone drove down the road and set several as they traveled. We managed to put them out before major damage was done, but never caught them.
Read my next post.