Their address is:
United Nations High Commissioner for Refugees
Case Postale 2500
CH-1211 Genève 2 Dépôt
They're emailable by using this simple form: http://www.unhcr.ch/cgi-bin/texis/vtx/c
Hundreds of Sudanese have been released from police detention camps onto the streets of this city with no money, no place to live - and in many cases, no shoes - three days after riot police attacked a squatter camp set up as a protest to press the United Nations to relocate the migrants to another country.