The action came after the girl revealed to police about her sexual exploitation, including by her own father, police said.
The child is being treated for venereal diseases at a government hospital here. According to the police who believe that 100-odd persons might be involved in the case, 29 had been arrested in recent days.
The girl told police that her father, who used to do odd roles in Malayalam films, first exploited her and then let many others in the industry and outside to do the same.
Hailing from Paravoor in Ernakulam district, the girl had revealed to a close relative about her plight following which a police complaint was filed some three months ago.
Police said 71 accused are absconding and five squads have been formed to trace them.
The victim had named some persons and a few more have to be identified, Crime Branch SP S Surendran told PTI today.
'We are collecting the details of the accused. There is no information about involvement of politicians,' he said.
Police had arrested a Tamil Nadu PWD contractor two days ago. His car which was used to transport the girl to his farm house had been seized.