The workers, hailing from Chattisgarh, were made to work for meagre wages and forced to stay in damaged sheds for the past one-and-half years in the factory at Chinniyampalayam, district officials said.
They were rescued yesterday by a team of Revenue and Labour Welfare Department officials led by Tahsildar Surendrakumar who raided the brick unit on a directive from District Collector S Prabhakar.
Officials said another labourer had recently managed to escape from the unit and lodged a complaint with the concerned district authorities in Chhattisgarh, who in turn alerted the Erode District Collector.
A case had been registered against the factory owner and further investigations is on.