Others named in the chargesheet include alleged European middlemen in the deal, Carlo Gerosa and Guido Haschke.
Michel may prove to be the missing link in the money trail in the alleged multi-crore scam being probed by the CBI.
Michel was extradited in an operation under the guidance of National Security Advisor Ajit Doval, the Central Bureau of Investigation said on Tuesday.
When the IAF veterans' bail petition came up for hearing, in an unprecedented move, senior serving and retired Air Marshals and Air Vice Marshals rallied behind the accused officers and appeared before the court to give sureties for each, something that has never happened ever before.
Along with Tyagi, his cousin Sanjiv alias Julie Tyagi and lawyer Gautam Khaitan were also arrested.
Swiss authorities have arrested Guido Ralph Haschke, the alleged middleman in the AgustaWestland VVIP helicopter deal, on charges of bribery, Italian media reported.
The agency 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 on Monday, the sources said.
The Indian Air Force headquarters in a reply said, 'The information sought vide your RTI application is not available at this HQ.'
The bribery scandal involving AgustaWestland's VVIP helicopter deal threatens to corner the Congress party and cast a shadow on India's latest $10 billion defence deal with Dassault for 126 Rafale fighter aircraft. Vicky Nanjappa reports
With the latest AgustaWestland helicopter import scandal, it is time to re-examine the role of the ubiquitous but ostensibly banned defence agents, middlemen, intermediaries, brokers, consultants, weapon merchants or reps as they are variously known, says Rahul Bedi
Carrying on with its probe into allegations of over Rs 360 crore bribe paid in the purchase of VVIP helicopters, the Central Bureau of Investigation recorded statement of Goa Governor B V Wanchoo as a "witness".
The Central Bureau of Investigation will soon approach United Arab Emirates authorities seeking extradition of British national and alleged middleman Christian Michel James in connection with its probe in the Rs 3,600 crore AgustaWestland VVIP choppers deal.
Orsi was at the helm of AugustaWestland when the deal was struck and he is suspected of involvement in the payment of bribes.
The Central Bureau of Investigation on Monday questioned former Indian air force Chief S P Tyagi and two others in connection with alleged irregularities in the AgustaWestland helicopter deal.
A Delhi Court on Friday dismissed the bail pleas of alleged middleman Christian Michel in connection with alleged AgustaWestland scam related corruption case filed by the Central Bureau of Investigation, and the money laundering case by the Enforcement Directorate.
The Central Bureau of Investigation will soon examine army officers who were part of the selection process for the 197 light utility helicopter deal which came under scanner of Italian authorities during their probe into bribery allegations against AgustaWestland in VVIP helicopter agreement.
After India scrapped a contract for procuring VVIP choppers from AgustaWestland, American firm Textron on Friday said it is ready to offer its unique V-22 Osprey helicopter to India for ferrying its dignitaries.
Pakistan has signed a deal with Italy-based aerospace giant Leonardo-Finmeccanica for purchasing an undisclosed number of helicopters for search and rescue operations.
The focus of the questioning is Tyagi's alleged links with Italian middlemen -- Carlo Gerosa and Guido Haschkhe, CBI sources said.
With an aggressive Opposition and unyielding government, important legislation could be the biggest casualty, as details of the helicopter contract surface.
The Comptroller and Auditor General on Tuesday slammed the Defence Ministry and Air Force for "several instances" of deviation from rules in the procurement of VVIP choppers in the Rs 3,727 crore AgustaWestland deal.
With the deal for procuring VVIP choppers from AgustaWestland facing the prospect of being scrapped, the Defence Research and Development Organisation on Wednesday said it has the capability to manufacture such helicopters even though it contended that producing anything entirely indigenously was impractical.
The former board member of Aeromatrix, which was allegedly used to route bribe amount, denied the payments were part of kick backs to clinch the deal.
CBI had registered a case against Tyagi along with 13 others including his cousins and European middlemen in the case.
Shah said the 'friendship' between Christian Michel, the alleged middleman in the deal, and Congress' top leadership is 'time tested and deep'.
Congress leader Veerappa Moily stated that the negotiation for Agusta began during former prime minister Atal Bihari Vajpayee's regime and all his advisors and defence ministers were involved.
A bail plea was also moved on his behalf. The court did not give any specific date for hearing the bail plea.
For a man revered for his probity, Defence Minister A K Antony was caught napping when bribes were paid over the AgustaWestland VVIP chopper deal. With the UPA government staring at another scam, nothing it seems will change, writes Sheela Bhatt.
Arriving in New Delhi within days of exposure of the Rs 3,600-crore VVIP helicopters scam involving Anglo-Italian firm AgustaWestland, British Prime Minister David Cameron is likely to be pressed for more information in this regard during his meetings with the leadership on Tuesday.
At least 12 benchmarks were changed between March and October 2009, including some relating to pilot safety, to reportedly allow PC-7 Mark II, fielded by Swiss company Pilatus, to qualify and win an IAF order worth Rs 3,780 crore for 75 basic trainer aircraft.
Cracking the whip, India on Friday initiated action to scrap the deal for purchase of 12 VVIP helicopters from Italian firm AgustaWestland in the wake of allegations that kickbacks to the tune of Rs 362 crore were paid to bag it.
British Prime Minister David Cameron arrived in Mumbai on Monday morning on a three-day India visit during which will he meet captains of industry and hold talks with top leaders, who are likely to seek more information on the VVIP helicopters scam involving an Anglo-Italian firm.
After India scrapped its Rs 3,600 crore deal for supplying VVIP choppers, Anglo-Italian firm AgustaWestland on Friday said that the contract termination notice sent to it does not offer any firm basis for taking any action against it.
He was subjected to a marathon 10-hour questioning on Thursday by ED investigators.
CBI sources said while Air Marshal (Retd) Gujral has been asked to appear for questioning on Saturday, Tyagi will be examined on Monday.
The CBI has so far maintained that Gujral was questioned as a witness, but remained tightlipped if he will still retain the same status.
The Central Bureau of Investigation has started fresh questioning of the cousins of former IAF chief SP Tyagi in the Rs 3,600 crore AgustaWestland VVIP helicopter deal in light of claims by alleged middleman Guido Haschke that he had paid money to them.
The commission has also sought records related to the termination of the deal to be presented before it in an in camera proceedings for its perusal before deciding whether they can be disclosed under the RTI Act or they attract its exemption clauses.
Prime Minister Manmohan Singh on Tuesday said that he conveyed India's concerns about the alleged unethical means used in securing the 2010 contract for AgustaWestland helicopters to British Prime David Cameron, and added that the latter has assured him of his government's cooperation in the investigations.
Govt said that it will take "suitable action" against Finmeccanica.