As part of its probe into the kidney transplant racket whose alleged kingpin is Amit Kumar, the CBI on Monday carried out searches at six places in Gurgaon and his nursing home and guest house and took charge of three of his suspected accomplices arrested by Uttar Pradesh police.

The agency, which is probing the inter-state and possible international ramifications of the multi-million dollar racket, carried out the searches also at some other nursing homes, guest houses and residences at Gurgaon.

The searches were conducted by seven CBI teams along with forensic experts.

The CBI questioned Kumar, who was remanded to the custody of the investigating agency till February 22, for the third day in succession to ascertain about the foreign links to his racket.

Kumar's statements need to be corroborated before any further action could be taken, a CBI official, associated with the probe, said.

Meanwhile, three of Kumar's suspected accomplices Upender, Jagdish Nai and Gyasuddin, arrested by Moradabad police, were handed over to CBI after which they were presented before a court in Gurgaon which remanded the trio to the agency's custody till February 16.

The CBI registered a case against Amit Kumar and others on February 8 under sections 420 (cheating), 342 (illegal confinement), 326 (causing grievous hurt), 506 (criminal intimidation) and 120-B (criminal conspiracy) and section 18 and 19 of Transplantation of Human Organs Act of 1994.

The case was transferred to CBI by Haryana government. Kumar, who was arrested by the Nepalese authorities, was brought back to India on Saturday last, two weeks after the racket came to light on January 24.

The CBI had also approached Haryana and Uttar Pradesh police to hand over all the evidence gathered by them so far to the agency, the sources said.

In a related development, a doctor Saraj Kovid, surrendered before a court in Gurgaon court. The CBI has moved an application seeking his remand, which will be heard on Tuesday, sources said.