After Nigeria gained its independence from British rule in 1960, stigma towards the Igbo ethnic group of the east increased. When a supposedly Igbo led coup overthrew and murdered senior government officials, the other ethnic groups of Nigeria, particularly the Hausa, launched a massive anti-Igbo campaign. This campaign began with the 1966 anti-Igbo pogrom and the 1966 Nigerian counter-coup. In the pogrom, Igbo property was destroyed and up to 300,000 Igbos fled the North and sought safety in the East and about 30,000 Igbos were killed. In the counter-coup that followed, Igbo civilians and military personnel were also systematically murdered. On 30 May 1967, when the Igbos declared their independence from Nigeria and formed the breakaway state of Biafra, the Nigerian and British governments launched a total blockade of Biafra. Initially on the offensive, Biafra began to suffer and its government frequently had to move because the Nigerian army kept on conquering its capital cities. The main cause of death was starvation, and children suffered the most. Children were often afflicted with Kwashiorkor, a disease caused by malnutrition. The people resorted to cannibalism on many occasions. The documentation of the suffering of the Igbo children is attributed to the work of the French Red Cross and other Christian organisations. There are many estimates for the death toll of the Igbo in the genocide. The number of soldiers who were killed in the war is estimated to be 100,000 and the number of civilians who were also killed ranges from 500,000 to 3.5 million. More than half of those who died in the war were children. Currently, Nigeria still suppresses peaceful protests by Biafra independence hopefuls, often by sending soldiers to beat protestors and even to kill them.