Doha: Amir H H Sheikh Tamim bin Hamad Al Thani, Deputy Amir H H Sheikh Abdullah bin Hamad Al Thani and Prime Minister and Minister of Interior H E Sheikh Khalid bin Khalifa bin Abdulaziz Al Thani sent cables of congratulations to HM Sultan Haitham bin Tariq of the Sultanate of Oman on the anniversary of assuming the reins of power.