India, March 18 -- Indian security agencies have stepped up surveillance and enforcement after the arrest of American national Matthew Aaron VanDyke, along with six Ukrainian citizens, in a case involving suspected drone warfare training and cross-border movement. The National Investigation Agency (NIA) carried out coordinated operations in Kolkata, Delhi, and Lucknow, indicating the scale and seriousness of the investigation.

Officials believe the group may have used India as a transit point for activities linked to armed groups operating near the India-Myanmar border, a region already sensitive due to insurgency concerns. The case has triggered alarm within security circles as it combines foreign nationals, advanced military-style tech...