Police sub-inspector S N Emhar of the Wada police station who is probing the case told PTI that the victims were on their usual rounds in the Kanchad block near the Kohoj Fort.
They spotted villagers illegally cutting trees in the jungle. When the forest personnel apprehended them, a mob of around 40 people attacked them with stones and other missiles, the police said.
Another forest guard Dharampal Mhaske escaped from the clutches of the illegal wood cutters, the police said.
Offences under Sections 353, 332, 333, 143, 147, 149 and 186 of the Indian Penal Code have been registered against the unidentified mob, the police said.