JOHANNESBURG (AFP) - Thousands of foreigners sought refuge at crowded community centres and police stations in Johannesburg on Monday as the death toll from a wave of xenophobic violence rose to at least 22. Mobs roaming through poor townships around South Africa's economic capital have killed and beaten up immigrants over the past week, with Zimbabweans and other Africans reporting purges by armed locals looking for foreigners. The violence erupted in Alexandra township early last week when two people were killed in an attack, and police said Monday that the number dead had risen to 22 with more than 250...