A Delhi court on Thursday directed the National Investigation Agency (NIA) to file its reply by Friday on the bail plea of American national Matthew Aaron VanDyke, who faces charges under the Unlawful Activities (Prevention) Act (UAPA) in connection with alleged conspiracy links to ethnic armed groups operating in India.

The special NIA court was hearing arguments on behalf of VanDyke, whose bail application was opposed by the probing agency. The court's order came after both sides presented their respective stands before the judge, with the NIA expressing opposition to the grant of bail while VanDyke's legal team sought interim relief pending the final disposal of the case.

Matthew Aaron VanDyke, a citizen of the United States, was apprehended as part of a broader investigation into networks alleged to be supporting and coordinating with insurgent and militant groups in various parts of the country. The NIA case against him centres on accusations that he provided ideological support and facilitated coordination between certain ethnic armed organisations based in India's northeastern regions and other groups, allegedly in violation of Indian counter-terrorism laws.

The UAPA, under which VanDyke has been charged, is one of India's most stringent anti-terror statutes. It imposes strict conditions for the grant of bail, requiring the court to be satisfied that there are reasonable grounds to believe the accused is not guilty of the offence. In practice, obtaining bail under this law is considered challenging, and courts scrutinise such applications carefully before granting any interim release.

The case has drawn attention not only because of its cross-border dimensions but also because it raises questions about the role of foreign nationals in domestic security matters. The NIA, established in 2008 as a central counter-terrorism investigative body, has increasingly taken up cases involving alleged foreign linkages to militant activities in India.

The Delhi court will now hear the NIA's written response on Friday before deciding whether to grant interim or regular bail to VanDyke. Legal analysts suggest that the agency's arguments — particularly regarding the severity of the charges and the possibility of VanDyke influencing witnesses — could play a decisive role in the court's decision.

VanDyke's lawyers have maintained that their client is being investigated in error and that the evidence relied upon by the NIA does not establish criminal liability. They have also pointed to his cooperative stance during the investigation and his lack of prior criminal record as grounds for bail.

The outcome of this bail hearing is expected to influence the trajectory of the larger investigation, as VanDyke's release or continued detention could affect the NIA's ability to pursue additional suspects named in the probe.