New Delhi, May 11 -- In a significant toughening of its counter-terrorism doctrine, the Government on Saturday declared that any future "act of terror" will be treated as an "act of war" and will be responded to accordingly.

A top Government official said, "Any future act of terror in India will be considered an act of war against the country and will be responded to accordingly." The statement marks a formal shift in India's rules of engagement, drawing a clear red line for Pakistan-based terror groups. New Delhi has made it clear that it will not hesitate to respond militarily to any attack, anywhere in India.

With this decision, the Government led by Prime Minister Narendra Modi has sought to draw a red line against terror incidents an...