Sources said the Gurgaon police had written to the CBI to approach the Interpol for issuance of the red corner notice against Dr Amit Kumar and co-accused Dr Jeevan Kumar. The ''doctors'' are believed to have fled the country following the raids ''If he has not fled the country so far, the doctor may make attempts to escape through illegal channels using his foreign contacts,'' the sources added. Police have circulated photographs of Dr Amit Kumar and Dr Jeevan Kumar and alerted airports across the country.
A red corner notice entails that most countries would be looking out for him.
Dr Amit Kumar along with several others had allegedly carried out more than 500 illegal kidney transplants during the past several years.
Police said the doctors used to sell each kidney for anything between Rs 15 lakh and Rs 20 lakh, they added.