One of the accused in the AgustaWestland VVIP chopper case was advocate Gautam Khaitan, the one who stands arrested.
The arrest has been made by the Enforcement Directorate under the Black Money Act.
The central agency claimed that Khaitan has several illegal properties.
Gautam Khaitan was arrested on Friday evening and would be produced before a special court later in the day.
Khaitan’s offices and properties in Delhi-NCR were raided by the Income Tax department last week.
Sources say he is also being probed for whether he received kickbacks in other defence deals.
Gautam Khaitan is one of the four Indians named by the Central Bureau of Investigation or CBI in its charge sheet in the Rs. 3,600 crore AgustaWestland case which involved buying 12 luxury choppers for politicians, during the Congress-led UPA government’s rule.