The Mau movement culminated on 28 December 1929 in the streets of the capital Apia, when the New Zealand military police fired on a procession who were attempting to prevent the arrest of one of their members. The day became known as "Black Saturday". Up to 11 Samoans were killed, including Mau leader and one of the paramount chiefs of Samoa Tupua Tamasese Lealofi III with many others wounded. One New Zealand constable was clubbed to death by protesters following the outbreak of hostilities.