Unconfirmed reports say the Arab Bank's Sabih al Masri, who is also a Saudi citizen, was detained in Riyadh on Wednesday.
A citizen of Saudi Arabia has released a video in protest against naming a street "Yazid ibn Muawiyah" in Jaddah.
Saudi authorities have beheaded an individual on murder charges a day after a UN appeal for an immediate moratorium on their use of the death penalty.