Saudi Arabia's King Salman has removed the country's veteran oil minister as part of a broad government overhaul.
Ali al-Naimi has been replaced after more than 20 years in the role by former health minister Khaled al-Falih.
Saudi Arabia, the world's largest crude exporter, unveiled major economic reforms in April, aimed at ending the country's dependence on oil.
About 70% of its revenues came from oil last year, but it has been hit hard by falling prices.
The government shake-up, announced in a royal decree, sees a number of ministries merged and others, such as the ministry of electricity and water, scrapped altogether.
A public body for entertainment is being created, and another for culture.
King Salman's son Prince Mohammad directs the country's economic policy, and Mr al-Naimi's removal is an indication that he wants tighter control over the commodity, foreign media reports.