The 1966 anti-Igbo pogrom was a series of massacres directed at Igbo and other people of southern Nigerian origin living in northern Nigeria starting in May 1966 and reaching a peak after 29 September 1966. During this period 30,000-50,000 Igbo civilians were murdered throughout northern Nigeria by Hausa–Fulani soldiers and civilians who sought revenge for the 1966 Nigerian coup d'état, carried out by six Majors and three Captains of Southern Nigerian extraction, and resulted in the deaths of 11 Nigerian politicians and army officers of Hausa, Fulani, Itsekiri and Yoruba origin. These events led to the Nigerian counter coup and eventually the secession of the eastern Nigerian region and the declaration of the Republic of Biafra, which ultimately led to the Nigeria-Biafra war. The 1966 massacres of southern Nigerians have been described as a holocaust by some authors and have variously been described as riots, pogroms or genocide.