JOHANNESBURG , South Africa ( CNN ) -- The atmosphere was tense in Cape Town on Friday after xenophobic violence that has left more than 40 dead in Johannesburg spread to South Africa 's largest city . Immigrants from Mozambique line up in Primrose , South Africa , to board buses back home . Clashes overnight resulted in one death and 15 arrests and the evacuations of 420 foreign nationals , a police official in Cape Town said . `` Crowds of people went on a rampage , looting and carrying out acts of violence , '' said Cape Town Police Superintendent Billy Jones . They were charged with public violence and are to appear in court Monday . One foreign national , a Somali , died when he was run over by a vehicle as he tried to escape the angry crowds , Jones said . Twelve people suffered minor injuries . He said Friday was tense but calm , with state and local police stationed throughout the area . Jack Bloom of the opposition party Democratic Alliance told CNN on Friday that government troops were helping police ward off violence in Johannesburg . Aid workers and volunteers were providing tents , food and supplies at the police stations . Bloom estimated that about 2,000 foreigners had sought haven at those locations . It was the first violence in the coastal city since a wave of xenophobia began about two weeks ago in Johannesburg , resulting in at least 42 deaths . The foreign nationals were transported from the city after angry crowds formed at a public meeting seeking to calm tensions , Jones told CNN . They were being housed at community centers and churches . The attacks in South Africa have forced thousands of immigrants to flee , prompting neighboring Mozambique to declare a state of emergency on Friday . Desperate stories of those fleeing violence . The country 's Foreign Minister Oldemiro Baloi said the decision was taken after about 10,000 Mozambicans fled from South Africa . CNN 's Robyn Curnow reported long lines of people -- including many from Zimbabwe and Mozambique -- waiting for buses in Johannesburg to take them home . Bloom , from Gauteng province , which includes Johannesburg , said the attacks on foreigners who fled to South Africa for a better life has become a `` humanitarian crisis . '' South African President Thabo Mbeki has approved the deployment of the army to help stop the attacks , which have drawn condemnation from South African officials and other African leaders . About 28,000 people have been displaced by the violence , Hangwani Malaudzi , a spokesman for the Ministry of Safety and Security said . And more than 400 have been arrested for crimes ranging from murder , to causing a public disturbance , he said . The country has also seen a disturbing throwback to the 1980s apartheid-era lynching tactic of `` necklacing , '' which was widely used in the townships at the time . Used on suspected informants , the `` necklace '' is a car tire , filled with petrol , put around the person 's neck and set alight . The victims are mainly immigrants and refugees from other parts of Africa , including Zimbabwe , where a devastated economy has sent at least two million people across the border in search of a better life . Some say the attacks stem from a long-standing feeling among locals that the number of immigrants in South Africa results in shortages of jobs and essential needs . Inadequate housing , a lack of running water and electricity , the rising prices of food , and escalating crime -- nearly 20,000 people were slain in South Africa last year -- add to the resentment . Watch analysis of reasons behind xenophobic attacks » . According to South Africa 's latest census , the country has about 45 million people . The South African Department of Human Affairs estimates that more than 4 million people reside in South Africa illegally , but that figure is based on a 10-year-old study and some feel the number of immigrants in South Africa is much higher . Some say that millions have recently fled to South Africa from Zimbabwe because of violence there since the county 's stalled election . A presidential run-off between long-time leader President Robert Mugabe and his opposition challenger , Morgan Tsvangirai , is scheduled for June 27 in Zimbabwe -- three months after the initial vote . Zimbabwe also is in the midst of an economic collapse , with nearly 80 percent unemployment .
Violence in Johannesburg spreads to Cape Town , resulting in one death . Mozambique declares state of emergency to assist people fleeing S. Africa . Attacks on foreigners in South Africa have left more than 40 people dead . Police , military in first joint operation raid three hostels .