"His Highness Salman bin Abdulaziz Al Saud and all members of the family and the nation mourn the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz, who passed away at exactly 1am this morning," said the statement.

King Abdullah's brother, King Salman has been named King and has made his half-brother Muqrin his crown prince and heir.

Thought to be born in 1923, King Abdullah has ruled the Kingdom of Saudi Arabia (KSA) since 2006.

Saudi's King Abdullah passes away