In pictures: World leaders in Oman to mourn Sultan Qaboos

His Highness Shaikh Mohammad Bin Zayed Al Nahyan, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces conveyed the condolences of President His Highness Shaikh Khalifa Bin Zayed Al Nahyan to Sultan Haitham Bin Tariq Al Said at the Royal Palace in Muscat.

Sultan Haitham receives Dr. Sheikh Sultan Bin Mohammed Al Qasimi, UAE Supreme Council Member and Ruler of Sharjah, in Muscat.

Sultan Haitham receives Britain's Prime Minister Boris Johnson in Muscat.

Sultan Haitham receives Shaikh Sabah Al Ahmad Al Jaber, the Emir of Kuwait, in Muscat.

Sultan Haitham receives King Hamad Bin Eisa Al Khalifa of Bahrain.

Sultan Haitham receives Jordan's King Abdullah in Muscat.

Sultan Haitham receives King Willem Alexander of Netherlands in Muscat.

Sultan Haitham with Tunisian President Qais Saeed who is on his first foreign visit since taking office in October.

Sultan Haitham receives Britain’s Prince Charles in Muscat.

Sultan Haitham receives Iraqi Deputy Prime Minister Fuad Mohammed Hussein in Muscat.

Sultan Haitham receives Algeria's Prime Minister Abdelaziz Djerad in Muscat.

Sultan Haitham receives Yemen's President Abed Rabbo Mansour Hadi in Muscat.

Sultan Haitham receives member of Sudan Sovereignty Council Hassan Mohammed Idris in Muscat.