Maoists on Wednesday blocked the Baliguda-Kantamala road near Sudra village in the Balliguda area of Kandhamal district by felling trees on the road.
Vehicular communication on the road was hit due to the road blockade.
Posters in the name of the KKBN Division of CPI(Maoist) which were found at the spot threatened to observe a 24-hour Kandhamal Bandh on Thursday to protest the killing of four Maoists in a police encounter at Sudrukumpa on May 13.
Notably, Special Operations Group (SOG) personnel on a tipoff had swooped down on a spot when the ultras were planning to launch a major offensive against the security forces.
The police recovered eight rifles including an AK-47 and an Insas Rifle from the encounter site.
Two cadre Maoists who had a bounty of Rs 5 lakh and 4 lakh were among the rebels killed.
In recent times, it was one of major successes of the State police in its operation against the Red rebels.