Maoist banners and posters surfaced near Jodinga under Raighar block in the district on Thursday urging people to boycott the upcoming elections.
The Red rebels stated in the banners and posters about their opposition towards the policies of the Central and State Governments regarding water, forest and land.
Police later seized the posters and banners and started investigation into the incident.
Combing operation in the area was being carried out, said Umarkote SDPO Hemant Kumar Padhi.
Earlier, similar posters and banners had surfaced in Kandhamal and Kalahandi districts, in which the rebels had criticised the politicians and asked people to attack them when they seek votes during election campaigns.
The Maoists had also threatened to murder police informers in coming days.