Tyagi arrived at the CBI headquarters at 11 am, sources said. The agency had questioned him on various aspects of the  case including his alleged links with middlemen, his alleged trips to Italy, reasons behind changing specifications, and relations with his cousins yesterday, the sources said.

Recently, the Milan Court of Appeals in Italy had concluded that bribes were paid to clinch the deal. CBI had registered a case against Tyagi along with 13 others including his cousins and European middlemen. The allegation against the former Air Chief was that he reduced flying ceiling of the helicopter from 6,000m to 4,500m (15,000ft) which made Agusta Westland helicopters eligible in the race for the deal.

Also read: AgustaWestland issue: How it all started

Tyagi has denied all the allegations against him. The agency had already questioned Tyagi in 2013 but this session is the first after the Italian court order. CBI sources said the agency called Gautam Khaitan, former board member of Aeromatrix, one of the suspect in the case, for questioning on Wednesday while cousins of Tyagi--Sanjeev, Rajeev and Sandeep--have been called later this week.

It is alleged by Italian prosecutors that bribes to clinch the deal were paid through middlemen and routed through a consultancy contract between AgustaWestland and companies owned by middlemen. Khaitan and the Tyagi cousins have strongly refuted the allegations against them.

Also read: AgustaWestland Chopper deal: Defence Minister Parrikar to place facts in Parliament on 4th May
Tyagi's visit to Italy twice after his retirement is under the scanner of the CBI, which is probing bribery charges in the Rs 3,600-crore AgustaWestland VVIP chopper deal.

Tyagi has told interrogators that he travelled to Florence, Milan and Venice in Italy in 2008 and 2009, after his retirement in 2007, informed sources said.

The former Air Chief Marshal was questioned yesterday by the Central Bureau of Investigation on the AgustaWestland deal in which kickbacks were allegedly paid to Indian officials and politicians.

CBI investigators told reporters on the condition of anonymity that they were yet to find out the reason for Tyagi's visit to the three Italian cities but they feel it must have been linked to the AugustaWestland deal.

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