The Supreme Court ordered the CBI on Thursday to complete probe into the alleged Rs 70,000 crore scam in purchase and leasing of aircraft by Air India during UPA-I government in 2005-06.
Attorney General Mukul Rohatgi informed a bench of Chief Justice J S Khehar and Justices N V Ramana and D Y Chandrachud that CBI had registered an FIR in 2013 and has already examined 55 witnesses.
"CBI has requested UK for certain information and has so far examined 55 witnesses. Investigations are likely to be completed by June," Rohatgi said.