Police said the Maoists torched two trucks parked along the NH-215 in Roxi area at about 5.30 am and left several posters.
Following the encounter with the rebels in Saranda forest in Jharkhand since Saturday, police had claimed that they had "sealed" the border to prevent the ultras from entering Orissa.
Police had said here that security was tightened with heavy patrolling and vigil in the border areas.
After the arson today, the police reached the spot and started combing operation.
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