At least one policeman died and four others were injured in an attack on the security officials near Egypt's St. Catherine's Monastery, local media reports said.
It is not clear whether the violence was the result of a blast or a shooting, Sputnik International reports.
The monastery lies at the foot of Mount Sinai, famous as the spot where Moses received the Ten Commandments.
The area is part of a UNESCO World Heritage site and is visited by thousands of tourists and pilgrims every year.
Further details are awaited.
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