Azerbaijan’s President Ilham Aliyev has sent a letter of condolences to his Iranian counterpart Masoud Pezeshkian.

"The news of the tragic death of Ayatollah Seyid Ali Khamenei, the Supreme Leader of the Islamic Republic of Iran, has deeply saddened us," President Aliyev said in his letter, The Caspian Post reports, citing AZERTAC.

"In connection with this heavy loss, we extend our deepest condolences to you, to the family of the deceased, and to the friendly Iranian people, and wish you patience and fortitude," the head of state said.

"Ayatollah Seyid Ali Khamenei was a figure who played a vital role in the life of the Iranian state and society over many years and held a special place in his country's political and religious life. His death is a great loss for Iran," President Aliyev stressed.

"On this difficult day, we wish peace, stability, and security to the friendly and brotherly Iranian people," the Azerbaijani leader added.