A court that specializes in terrorism cases handed down the sentence Tuesday, Middle East Online reported.
The defendant, who has not been named, recruited several people in a plot to assassinate the grand mufti, Sheik Abdul Aziz bin Abdullah al-Sheik, in addition to other clerics and security officials.
The prisoner has a month to appeal the sentence.
In 2011, Saudi Arabian courts began trying defendants linked to a wave of al-Qaida attacks that occurred between 2003 and 2006.
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