A/HRC/19/57 Government concerned Number of urgent appeals Persons concerned Tunisia 1 4 men Turkey 2 4 men, 2 women Turkmenistan 1 1 man Ukraine 1 8 men United Arab Emirates 5 11 men Uzbekistan 1 5 men Viet Nam 2 6 men, 2 women Yemen 2 Undetermined Zimbabwe 1 45 men Persons released/Information received from 27. The Working Group wishes to thank those Governments that heeded its appeals and took steps to provide it with information on the situation of the persons concerned, especially the Governments that released those persons. In other cases, the Working Group was assured that the detainees concerned would receive fair trial guarantees. B. Country visits 1. Requests for visits 28. The Working Group has been invited to visit on official mission Argentina (a follow-up visit), Azerbaijan, Burkina Faso, El Salvador, India, Japan, the former Libyan Arab Jamahiriya, Spain and the United States of America. 29. The Working Group has also asked to visit Sierra Leone, a country, which in spite of having extended an open formal invitation to all the thematic mechanisms of the Human Rights Council, has not yet replied to the Working Group’s request. It has also made requests to visit Algeria, Bahrain (a follow-up visit), Brazil, Egypt, Ethiopia, Greece, Guinea-Bissau, Morocco, Nauru, Nicaragua (a follow-up visit limited to Bluefields), Papua New Guinea, the Russian Federation, Saudi Arabia, the Syrian Arab Republic, Thailand, Turkmenistan, the Philippines, Uzbekistan and the Bolivarian Republic of Venezuela. 2. Follow-up to country visits of the Working Group 30. In accordance with its methods of work, the Working Group decided in 1998 to address a follow-up letter to the Governments of countries it had visited, requesting information on such initiatives as the authorities might have taken to give effect to the relevant recommendations adopted by the Working Group contained in the reports on its country visits (E/CN.4/1999/63, para. 36). 31. During 2011, the Working Group requested information from Angola, Italy, Malta and Senegal. It received information from the Governments of Angola and Colombia. Angola 32. By letter of 12 April 2011, the Government of Angola informed the Working Group of the measures taken in compliance with the recommendations issued in the Working 14