The National Investigation Agency has invoked the Foreigners Act against seven foreign nationals arrested in an alleged terror-conspiracy case, according to The Indian Express. The agency is also seeking further investigation into the wider network.
The legal point is that immigration violations and terrorism-related allegations can proceed under different statutory frameworks. For UPSC, distinguish the Foreigners Act and immigration regulation from special anti-terror legislation such as the UAPA, and avoid assuming that one type of charge proves the other.