Saudi Arabia's Crown Prince Nayef bin Abdul-Aziz al-Saud has died. He was in his late 70's.

State media reports on Saturday say Prince Nayef died while abroad. He recently traveled to Europe for medical treatment.

The news reports say he will be buried on Sunday but did not provide additional details about his illness or cause of death.

Prince Nayef was serving as interior minister when King Abdullah named him crown prince last year.

He had led the Interior Ministry since 1975 and was closely aligned with the country's conservative clerics.

As crown prince, he would have assumed the throne upon King Abdullah's death.