Saudi Arabia's King Abdullah is in the holy city of Mecca as officials prepare for the burial of the country's crown prince.

The official Saudi News Agency says the 88-year-old monarch arrived in Mecca on Saturday after the death of Crown Prince Nayef bin Abdul-Aziz, the second heir to the Saudi throne to die in less than a year.

Nayef's body was expected to arrive Sunday in Jiddah from Geneva, where he was receiving medical treatment. Burial was planned for later Sunday in Mecca.

Royal family members will then convene after a mourning period to select the next crown prince of OPEC's top producer. The expected choice is the 76-year-old defense minister, Prince Salman. But it also opens room for a younger prince to move up the line of succession.