The CBI on Friday registered a case against Amit Kumar, alleged to be the kingpin in the kidney transplant racket, and quickly followed it up with a request to Nepal for handing him over to face trial in India.

The CBI registered the case soon after receiving an order from the Haryana government.

"We have re-registered the case in the kidney scam," CBI Director Vijay Shanker said.

Haryana ordered the CBI probe into the racket given its countrywide and international reach. Initially, the case registered by the Haryana police and it was registered afresh by CBI's economic offences wing following which relevant papers were sent to Kathmandu to secure the return of Kumar from authorities in Nepal where he was arrested.

The CBI had earlier this month secured a red-corner notice from Interpol to trace Kumar and his brother Jeevan.