The workers were holding demonstrations near Gatta Check Post of Etapalli, a taluka town in the district, in protest against the transportation of iron ore yesterday.
They stopped three trucks as part of their agitation and did not allow them to go further. However, the police reached the spot and detained the demonstrators.
All of them were later released, said the police.
A private company, which has been given a lease of iron ore, has started transporting the mineral from the hills for the last few days. The company has also started road construction work for this purpose.
Besides the Samiti, other organisation and parties agitating over the issue include Adivasi Vidyathi Sangha, Aheri Zilla Nirman Kriti Samiti and Congress.
They say iron ore should not be transported till the State Government takes steps to set up industries in Gadchiroli district.