The 2011 Egyptian revolution, also known as the 25 January Revolution, began on 25 January 2011 and spread across Egypt. The date was set by various youth groups to coincide with National Police Day as a statement against increasing police brutality during the later years of Hosni Mubarak's presidency. It consisted of demonstrations, marches, occupations of plazas, non-violent civil resistance, acts of civil disobedience and strikes. Millions of protesters from a range of socio-economic and religious backgrounds demanded Mubarak's removal from the office of president of Egypt. Violent clashes between security forces and protesters resulted in at least 846 people killed and over 6,000 injured. Protesters retaliated by burning over 90 police stations across the country.