23-year-old Veerasami, arrested on June 13 two days after the sexual assault, was also involved in a few other criminal cases, including assault and theft, and hence Coimbatore District Collector Archana Patnaik ordered his detention under the Goondas Act, they said.
The order was served on him at the Central Jail in the city, where he is under judicial remand since his arrest.
The girls, aged 10 and 11, and inmates of the hostel in Pollachi were abducted and raped on the terrace of an adjacent building at knife point on June 11 by Veerasami and another person who approached them under the pretext of asking for water.