The September 11 attacks are an example of religious mass-killing. In India, incidents of attacks by hindu-nationalists upon christians have periodically occurred since independence. The United States Department of State in its annual human rights report for 2006 noted attacks against the people of religious groups who are small in number. State Department's annual reports on religious freedom for 2007 expressed concern over organized societal attacks against religious minority in India. Some state governments in India have been accused of not effectively prosecuting those who attack religious minorities.