Within a short time of its inception, these organisations became the focus of an extensive police and intelligence operations. Operations against saw founding of the Special Branch of Calcutta Police. The intelligence operations against India House saw the founding of the Indian Political Intelligence Office which later grew to be the Intelligence Bureau in independent India. Heading the intelligence and missions against Ghadarite movement and India revolutionaries was the MI5(g) section, and at one point involved the Pinkerton's detective agency. Notable officers who led the police and intelligence operations against Indian revolutionaries, or were involved in it, at various time included John Arnold Wallinger, Sir Robert Nathan, Sir Harold Stuart, Vernon Kell, Sir Charles Stevenson-Moore and Sir Charles Tegart, as well as W. Somerset Maugham. The threat posed by the activities of the Samiti in Bengal during World War I, along with the threat of a Ghadarite uprising in Punjab, saw the passage of Defence of India Act 1915. These measures saw the arrest, internment, transportations, and execution of a number of revolutionaries linked to the organisation, and was successful in crushing the East Bengal Branch. In the aftermath of the war, the Rowlatt committee recommended extending the Defence of India Act (as the Rowlatt act) to thwart any possible revival of the Samiti in Bengal and the Ghadarite movement in Punjab.
Within a short time of its inception these organisations became, the focus of an extensive police and intelligence operations. Operations against saw founding of the Special Branch of Calcutta Police. The intelligence operations against India House saw the founding of the Indian Political Intelligence Office which later grew to be the Intelligence Bureau in independent India. Heading the intelligence and missions against Ghadarite movement and India revolutionaries was the MI5(g) section, and at one point involved the Pinkerton's detective agency. Notable officers who led the police and intelligence operations against Indian revolutionaries, or were involved in it, at various time included John Arnold Wallinger, Sir Robert Nathan, Sir Harold Stuart, Vernon Kell, Sir Charles Stevenson-Moore and Sir Charles Tegart, as well as W. Somerset Maugham. The threat posed by the activities of the Samiti in Bengal during World War I, along with the threat of a Ghadarite uprising in Punjab, saw the passage of Defence of India Act 1915. These measures saw the arrest, internment, transportations, and execution of a number of revolutionaries linked to the organisation, and was successful in crushing the East Bengal Branch. In the aftermath of the war, the Rowlatt committee recommended extending the Defence of India Act (as the Rowlatt act) to thwart any possible revival of the Samiti in Bengal and the Ghadarite movement in Punjab.