The National Investigation Agency ( NIA ) is a specialized counter-
terrorism law enforcement agency in India. The agency is empowered to deal
with the investigation of terror related crimes across states without special
permission from the states under written proclamation from the Ministry of
Home Affairs. The primary mandate of the National Investigation Agency is to
investigate and prosecute offenses that have national and cross-border
implications, specifically focusing on terrorism, insurgency, and other
related matters. It is empowered to investigate cases that involve threats to
the sovereignty, security, and integrity of India.