Guwahati, Nov 29 (ANI): Union Home Minister Rajnath Singh on Saturday while addressing the 49th DGPs/IGs conference in Guwahati raised the issue of ISIS and called it a major security threat. He also hit out at Pakistan, saying the state actors from the country play a role in attempts to destabilize India. Talking tough on militant attack in Arnia, the Home Minister rejects Pakistan claims non-state actors are behind the incident. Rajnath asks if ISI also non-state actor. The home minister also added that the country is united to fight any anti-national activity. Talking about the Burdwan blasts, he said that West Bengal police and NIA are playing crucial role in its probe.