Along with Tyagi, his cousin Sanjiv alias Julie Tyagi and lawyer Gautam Khaitan were also arrested.
Parrikar had recently challenged the Congress to show the order by the UPA government confirming the blacklisting.
Michel was arrested in the United Arab Emirates and extradited to India on December 4.
Swamy gave notice in the Rajya Sabha for moving Breach of Privilege Motion against Leader of Opposition Ghulam Nabi Azad over his remarks related to the AgustaWestland issue.
Counsels for AgustaWestland VVIP chopper scam accused Christian Michel and fugitive diamantaire Nirav Modi were also the potential targets of Israeli spyware Pegasus.
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.
Uttam Ghosh/Rediff.com offers his unique perspective on several issues of the day.
The AgustaWestland VVIP chopper deal will once again dominate the proceedings in Parliament on Thursday.
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.
The Indian Air Force headquarters in a reply said, 'The information sought vide your RTI application is not available at this HQ.'
The probe agency sought nine days further remand of Michel for his custodial interrogation saying he was not cooperating in the investigation of the case.
Michel, extradited from Dubai, was arrested by the ED on December 22 last year.
In his plea, Michel said the investigation regarding him was over and no useful purpose would be served by keeping him in further incarceration.
A Delhi court on Saturday sent former Air Force Chief S P Tyagi, arrested in Rs 450 crore Agusta Westland bribery case in procurement of 12 VVIP helicopters, to police custody for four days after the CBI said he was needed to be quizzed to unearth a "very large conspiracy having international ramifications".
The chargesheet said according to the 'budget sheet, 30 million were paid to Air Force officers.
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.
'We will continue to ask why Modi and his government were benefactors to this AgustaWestland company, why within 40 days they overturned the ban?'
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.
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.
Michel, who was extradited from Dubai recently, was arrested by the Enforcement Directorate on December 22 and sent to a seven-day custody of the agency over money-laundering charges in the scam by a court.
The British high commission had sought consular access to Michel after he was arrested in the first week of December.
With an aggressive Opposition and unyielding government, important legislation could be the biggest casualty, as details of the helicopter contract surface.
A special court denied Christian Michel bail in the related Central Bureau of Investigation case.
The Central Bureau of Investigation has started another probe against UK-based helicopter supplier AgustaWestland for alleged corruption in the supply of Light Utility Helicopters to Army.
Rajiv Saxena, an accused in AgustaWestland chopper deal scam, was extradited from Dubai, UAE, to India .
Saxena, a director of Dubai-based firms UHY Saxena and Matrix Holdings, is one of the accused named in the chargesheet filed by the ED in the Rs 3,600-crore AgustaWestland scam.
He was subjected to a marathon 10-hour questioning on Thursday by ED investigators.
CBI had registered a case against Tyagi along with 13 others including his cousins and European middlemen in the case.
In a bid to corner the Congress after it launched a tirade against it for imposition of President's rule in Uttarakhand, the ruling dispensation has decided to raise issues of AgustaWestland Chopper scam, Aircel Maxis scam and the Ishrat Jahan case in the Parliament on Wednesday.
Swiss authorities have arrested Guido Ralph Haschke, the alleged middleman in the AgustaWestland VVIP helicopter deal, on charges of bribery, Italian media reported.
Special judge Arvind Kumar issued notice to the agency and directed it to file a reply on Michel's plea, which had stated that he had not named anybody in connection with the deal during investigation by the ED and that even though the court has not taken cognisance of the documents, in order to make the entire case a sensation again in the media, the agency had leaked the chargesheet.
'Who you know today will determine who you know tomorrow.' 'Becoming an expert in your domain will incentivise others to have you in their networks.' 'And the more diverse your network, the better it is.' An enlightening excerpt from Ambi Parmeswaran's All The World's A Stage: A Personal Branding Story.
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.
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.
The ED, in its chargesheet filed against Michel in June 2016, had alleged that he received 30 million (about Rs 225 crore) from AgustaWestland.
The ex-IAF chief was questioned in the same case by CBI for the last three days. This is the first time that the ex-Chief of Staff of the Indian Air Force has been summoned by the Enforcement Directorate.
At Amish Tripathi's book launch, Varun Dhawan spoke about his love for Suppandi.
The session of Rajya Sabha came to an end on Friday after passing 12 bills and wasting 19 hours due to disruptions over various issues like imposition of President's rule in Uttarakhand and AgustaWestland helicopter deal controversy.
The chairman asked Swamy to produce documents he quoted from in the AgustaWestland debate after Congress leader Jairam Ramesh raised the issue.
