Minor sectarian clashes have occurred during the Bahraini uprising. On 4 March 2011, about six people[4] were injured in Hamad Town and police intervened to disperse young Shi'ites and largely recently naturalised Sunni Arabs who clashed with knives, sticks and swords, witnesses said.[5] It is unclear what caused the incident,[6] with both sides blaming the other for the outbreak of violence.[5] This incident marks the first sectarian violence since protests erupted on 14 February.