The Food Safety Department officials seized 2.75 tonnes of mangoes and bananas, which were ripened artificially, from different shops in Salem city on Saturday.
On a tip-off, a team of officials led by S. Mariappan, Designated Officer of the Tamil Nadu Food Safety and Drug Administration Department, conducted surprise check in the fruit godowns before the break of dawn in the city.
The officials spotted that artificial methods like using prohibited acetylene gas, commonly known as carbide gas, for ripening the fruits was detected in all the cases.
The officials seized one tonne of mangoes and 1.75 tonnes of plantains from the godowns belonging to three traders.
Cases were registered against all the three persons.