Sinai and Palestine Campaign of World War I and became part of British-administered Mandatory Palestine until 1948. Tel Aviv, established as suburb of Jaffa, received "township" or local council status within the Jaffa Municipality in 1921. According to a census conducted in 1922 by the British Mandate authorities, the Tel Aviv township had a population of 15,185 inhabitants, consisting of 15,065 Jews, 78 Muslims and 42 Christians. Increasing in the 1931 census to 46,101, in 12,545 houses. With increasing Jewish immigration during the British administration, friction between Arabs and Jews in Palestine increased. On 1 May 1921, the Jaffa riots resulted in the deaths of 48 Arabs and 47 Jews and injuries to 146 Jews and 73 Arabs. In the wake of this violence, many Jews left Jaffa for Tel Aviv. The population of Tel Aviv increased from 2,000 in 1920 to around 34,000 by 1925. Tel Aviv began to develop as a commercial center. In 1923, Tel Aviv was the first town to be wired to electricity in Palestine, followed by Jaffa later in the same year. The opening ceremony of the Jaffa Electric Company powerhouse, on 10 June 1923, celebrated the lighting of the two main streets of Tel Aviv. In 1925, the Scottish biologist, sociologist, philanthropist and pioneering town planner Patrick Geddes drew up a master plan for Tel Aviv which was adopted by the city council led by Meir Dizengoff. Geddes's plan for developing the northern part of the district was based on Ebenezer Howard's garden city movement. While most of the northern area of Tel Aviv was built according to this plan, the influx of European refugees in the 1930s necessitated the construction of taller apartment buildings on a larger footprint in the city. Ben Gurion House was built in 1930–31, part of a new workers' housing development. At the same time, Jewish cultural life was given a boost by the establishment of the Ohel Theatre and the decision of Habima Theatre to make Tel Aviv its permanent base in 1931. 1934 municipal independence from Jaffa Tel Aviv was granted the status of an independent municipality separate from Jaffa in 1934. The Jewish population rose dramatically during the Fifth Aliyah after the Nazis came to power in Germany. By 1937 the Jewish population of Tel Aviv had risen to 150,000, compared to Jaffa's mainly Arab 69,000 residents. Within two years, it had reached 160,000, which