processing. Other large early ethnic populations in Omaha included Danes, Poles, and Swedes. A growing number of African immigrants have made their homes in Omaha in the last twenty years. There are approximately 8,500 Sudanese living in Omaha, including the largest population of Sudanese refugees in the United States. Most have immigrated since 1995 because of warfare in Sudan. They represent ten ethnic groups, including the Nuer, Dinka, Equatorians, Maubans and Nubians. Most Sudanese people in Omaha speak the Nuer language. Other Africans have immigrated to Omaha as well, with one-third from Nigeria, and large populations from Kenya, Togo, Cameroon and Ghana. With the expansion of railroad and industrial jobs in meatpacking, Omaha attracted many immigrants and migrants. As the major city in Nebraska, it has historically been more racially and ethnically diverse than the rest of the state. At times rapid population change, overcrowded housing and job competition have aroused racial and ethnic tensions. Around the start of the 20th century, violence towards new immigrants in Omaha often erupted out of suspicion and fear. In 1909, anti-Greek sentiment flared after increased Greek immigration, and worsened their tendency to become strikebreakers. The killing of a policeman of Irish descent enraged the Irish community; an angry mob violently stormed the Greek neighborhood in Omaha in what would become known as the Greek Town Riot. That mob violence forced the Greek immigrant population to flee from the city. By 1910, 53.7% of Omaha's residents and 64.2% of South Omaha's residents were foreign born or had at least one parent born outside of America. Six years after the Greek Town Riot, in 1915, a mob killed Juan Gonzalez, a Mexican immigrant, near Scribner, a town in the Greater Omaha metropolitan area. The event occurred after an Omaha Police Department officer investigated a criminal operation that sold goods stolen from the nearby railroad yards. Racial profiling targeted Gonzalez as the culprit. After escaping the city, he was trapped along the Elkhorn River, where the mob, including several policemen from Omaha, shot him more than twenty times. It was discovered Gonzalez was unarmed, and he had a reliable alibi for the time of the murder. No one was ever indicted for his killing. In the fall of 1919, following Red Summer, postwar social and economic tensions, the earlier hiring of African Americans as strikebreakers, and job uncertainty contributed to a mob from South Omaha lynching