In 1930, the British government issued the Passfield White Paper, a formal statement of policy in Palestine. The paper was an attempt to appease the Arabs in the aftermath of the 1929 riots: During six days of Arab rioting in Jerusalem, Gaza, Hebron and Tzfat, 135 Jews were killed and more than 300 wounded. The White Paper criticized the Jewish Agency for promoting Jewish employment opportunities, claiming that it damaged economic development of the Arab population. Further, the paper required that Jews obtain permission from the British authorities to purchase land. The result was that Jewish immigration was greatly curtailed.