Police on Sunday opened an investigation into suspected animal cruelty after a scorched horse carcass was found in a forest outside the northern city of Acre.
The horse had apparently been tortured and repeatedly beaten before being set alight, police said.
The disturbing case was uncovered after passersby in the woods noticed a foul smell and suspected that it may have been coming from a decaying human body, Channel 2 reported.
Police officers who arrived at the scene found the immolated horse tied to a tree by its front legs and to a rock by its hind legs, the report said.
Police notified the Acre municipality, as well as veterinarian services in the area.