Sultan of Oman Haitham bin Tariq Al Said has addressed a letter of congratulations to the President of the Republic of Azerbaijan Ilham Aliyev on the occasion of Independence Day, APA reports. The letter reads: "We are pleased to extend our sincere felicitations to Your Excellency on the occasion of the National Day of the Republic of Azerbaijan. We take this opportunity to wish you happiness and good health, and the friendly people of Azerbaijan continued progress and prosperity." Source: Azeri-Press news agency