New Delhi: CBI yesterday carried out lie detector test on the fathers of the two cousin sisters from Badaun in Uttar Pradesh who were allegedly raped, killed and their bodies found hanging from a tree even as the victims' family objected to the move of the agency.

CBI sources said the fathers of the rape victims, a family member and a witness have been brought to undergo polygraph test at Central Forensic Science Laboratory in CGO complex here.

Protesting the move, the victims' brother Virendra along with the members of Naya Daur Party sat on fast unto death here at Jantar Mantar alleging that CBI is harassing his family by subjecting his father to lie-detector test.

Speaking to PTI, he said CBI is focusing on the victims rather than the accused.

The sources said they have taken three-days time from the court in Badaun to subject these four persons to polygraph or lie-detector test but if the procedure is completed earlier they may be allowed to go.