The ultras have also appealed to tribals to join them.
"Naxals have put up two banners in Mundapara village in Vishrampur area on the border of Chhattisgarh and Odisha in Kondagaon district, advertising their "open" recruitment drive," a senior police official said.
"The ultras have also warned the tribals not to take part in the government's recruitment drive."
According to the official, as movement in the forest becomes difficult during monsoon, ultras stay in villages and concentrate on propagation of their ideology and recruitment.
"Naxals usually hold recruitment campaign and even publish advertisement through posters whenever a recruitment programme is taken up by police or paramilitary forces," the official said, adding that the police also appeal to tribals not to be cowed down by such false campaigns.