The Central Bureau of Investigation has initiated a preliminary enquiry into allegations of nepotism and favouritism against some Indian Olympic Association officials in sending two medical professionals with the Indian team to the Rio Olympics last year.

It is alleged that Dr Pawandeep Singh and RS Negi did not have requisite qualification and experience but were sent to the games from July 24, 2016 to August 23, 2016 with the Indian contingent.

Agency sources said there are allegations of nepotism, favourtism, and irregularities against certain officials of the IOA which are being examined by the CBI.