Police freed 275 people who were being forced to work at a tomato farm in San Gabriel, a city in the western Mexican state of Jalisco, prosecutors said.
The victims - 191 men, 45 women and 39 children - belonged to 42 families and were forced to live inside the tomato packing plant in subhuman conditions, the Jalisco Attorney General's Office said.
The workers were from rural communities in Veracruz, San Luis Potosi and Hidalgo states, the AG's office said.
Three workers who recently escaped from the farm tipped off police, the AG's office said.
The victims told investigators they were tricked into going to work at the farm and were never paid the wages they agreed to, prosecutors said.
Workers said they were supposed to be paid 100 pesos ($7.80) per day but were later told they had to pick enough tomatoes to fill 40 crates to earn that amount. EFE