Bloody Thursday is the name given by Bahraini protesters to 17 February 2011, the fourth day of the Bahraini uprising as part of the Arab Spring. Bahraini security forces launched a pre-dawn raid to clear Pearl Roundabout in Manama of the protesters camped there, most of whom were at the time asleep in tents; four were killed and about 300 injured. The event led some to demand even more political reform than they had been before, calling for an end to the reign of King Hamad bin Isa Al Khalifa.