India’s police and internal security system is highly fragmented and often poorly coordinated. The country’s federal political system leaves most policing responsibilities to the states, which usually possess their own counterterrorism and intelligence units. These forces, especially local police, are often poorly trained and equipped. Local personnel are frequently hired on the basis of political patronage and are notorious for high levels of corruption.
There is also a variety of central investigative, law enforcement, and intelligence agencies. The Ministry of Home Affairs includes the Intelligence Bureau, Central Reserve Police Force, Indian Police Service, and new National Investigation Agency, while the Research and Analysis Wing and Central Bureau of Investigation are answerable to the prime minister. The military—which is primarily geared toward foreign threats, including terrorism—also generates intelligence with relevance to domestic terrorism, and there is a centrally controlled National Security Guard (NSG) that specializes in hostage and terrorist attack situations.

Read more at: https://ctc.usma.edu/improving-indias-counterterrorism-policy-after-mumbai/