India police

The little girl, aged between eight and 10, was found a few weeks ago in a forest in Uttar Pradesh.

Doctors said she could not communicate and displayed "monkey-like" traits.

A senior police official told BBC Hindi she had been playing with a pack of monkeys and imitating their behaviour when police went to rescue her.

The little girl was spotted by villagers in the Katarniaghat wildlife sanctuary, on the Indian border with Nepal.

The police official, Suresh Yadav, said the monkeys attacked his squad when they arrived to take her away.

Officers say the suspects obtained lists of US tax defaulters and used threats to obtain their bank details.

The scam is said to have netted more than $150,000 (£118,000) a day, making it one of the biggest frauds in India's history.

Thane police officials said they were contacting the FBI to ask for help.

Some 70 of those detained were formally arrested, police said, with the rest released pending further inquiries. Nine people believed to have led the scam have been identified.