President Gotabaya Rajapaksa and Prime Minister Mahinda Rajapaksa have expressed condolences and offered sympathy to the people of Oman following the death of Sultan of Oman, Sultan Qaboos bin Said Al Said.The 79-year-old long-serving ruler died late on Friday, ending his 49-year-old rule during which the poverty-stricken Middle East nation was transformed into a prosperous state.