Bahrain’s Sheikh Khalifa bin Salman al Khalifa, the world’s longest serving prime minister and a staunch ally of neighbouring Saudi Arabia and the United States, has died, the royal palace announced on Wednesday. Sheikh Khalifa, a dominant figure in the Gulf island’s politics for much of his near half century in power, passed away on Wednesday morning at Mayo Clinic hospital in the United States, Bahrain’s state news agency said. Khalifa, 84, the uncle of King Hamad bin Isa al-Khalifa, had served as prime minister since the Sunni Muslim-led island kingdom declared independence from Britain in 1971, almost half a century. The al-Khalifa family has ruled since 1783. His stern response to pro-democracy protests in Bahrain in 2011 — and criticism of similar unrest across the Arab world — underlined what for many was the defining characteristic of his career, namely a stalwart defence of dynastic rule. In August, Sheikh Kahlifa left the kingdom for what official media called at the time “a private visit abroad”. Earlier this year he spent time in Germany for unspecified medical treatment, returning to Bahrain in March. The burial ceremony will take place upon the repatriation of his body and the funeral will be limited to a specific number of relatives, Bahrain’s state news agency said. Official mourning has been declared for a week and government ministries and departments will close for three days starting Thursday. Bahrain is the home base of the US Navy’s Fifth Fleet. Meanwhile, President Dr Arif Alvi on Wednesday expressed grief over the demise of Bahrain’s Prime Minister Prince Khalifa bin Salman Al Khalifa. The death of the Bahraini leader was announced earlier in the day by Bahrain News Agency saying, “The Royal Court mourns His Royal Highness Prince Khalifa bin Salman Al Khalifa, the Prime Minister who passed away this morning at Mayo Clinic Hospital in the United States of America.” President Alvi sympathized with the people of Bahrain and prayed for peace of the departed soul. He also prayed for the bereaved family to bear the loss with fortitude. According to Arab media, 84-year old Sheikh Khalifa was one of the world’s longest-serving prime ministers who held the post since Bahrain’s independence in 1971.