According to the police, the landmines were found fitted under two separate culverts during a combing operation by the police on Tuesday, Aug 3.
Six Maoist guerrillas were also arrested and they would be produced in a local court on Tuesday, Aug 3, Superintendent of Police Diptesh Patnaik said.
The rebels were held from Kalta area of the Maoist-infested Bonai sub-division, about 450 km from Bhubaneswar.
"Maoists planted landmines under two separate culverts to trigger blasts, thankfully we recovered the landmines," Diptesh Patnaik said.
"They were involved in several crimes, including the murder of trade union leader Thomas Munda in Jan 2010," Patnaik added.