The activists, around 30 in number, were stopped by the police at the Dhodhar toll plaza in Ratlam district's Jaora town.
The police told them that their visit could disturb peace in Mandsaur, from where curfew was lifted yesterday. Prohibitory orders under CrPc Section 144 are in place in the district.
After being stopped, the activists, including JNU students union President Mohit Kumar Pandey and representatives from various farmer outfits across the country, sat on protest on the Mhow-Neemuch Highway, disrupting traffic movement.
They also argued with the police and Ratlam administration officials to allow them to enter Mandsaur.
More From This Section
Following this, the police arrested the 30 activists under CrPC section 151 (arrest to prevent the commission of cognizable offences), Jaora SDM R P Verma said.
After the arrest, Yadav told mediapersons, "Our arrest is against the law as no written order was shown to us."
"We wanted to meet the families of deceased farmers peacefully and honour them by giving them a letter and soil brought from different parts of the country but we were not allowed to go," he said.
He also demanded a probe into the death of the six people who have died during the farmers' agitation so far.
Patkar said, "We are being told that if we go to Mandsaur, peace may get disturbed . We are unable to understand how it will affect the peace."
"We are not going there for any protest or demonstration, we just wanted to meet the deceased farmers' family," she said.
Heavy police force and water cannons were deployed and barricades placed, hours before the activists reached the Dhodhar toll plaza.
The Mandsaur-Neemuch region, about 300 km from the state capital Bhopal, became the nerve centre of the storm of farmer distress. Later, protests spread to some other parts of the state.
In Mandsaur, the curfew was imposed after five persons were killed in police firing during the farmers' protest on June 6.