[Radio Dabanga] Khartoum / Manama -- Sudan's federal Minister of Foreign Affairs, Maryam El Sadig El Mahdi returned to Khartoum on Thursday, concluding a successful four-day visit to Bahrain, during which she met King Hamad bin Isa Al Khalifa, Crown Prince and Prime Minister Prince Salman bin Hamad Al Khalifa, and a number of senior Bahraini officials.