An American citizen, Matthew Aaron VanDyke, was arrested by the National Investigation Agency (NIA) on March 13 along with six Ukrainian nationals for their alleged links to anti-India insurgent groups.
The agency said all of them had entered India on tourist visas illegally and were working in close contact with anti-India insurgent groups.
VanDyke, from Baltimore in the US state of Maryland, claims to be a veteran of the Libyan revolution and was held as a prisoner of war there.
He set up a military contracting company called SOLI (Sons of Liberty International) which provides free security and military consulting and training to communities fighting terrorism, insurgency, and oppressive regimes.
The NIA has filed a case under section 18 of the Unlawful Activities (Prevention) Act, 1967, which deals with conspiracy, support, abetment or incitement to carry out a terrorist act.
A Delhi court sent all seven to NIA custody until March 27 and the agency is also looking for eight more Ukrainians.
