The United States Embassy in Cairo has instructed its staff not to travel anywhere in Egypt's Sinai Peninsula as a "precautionary measure," pending the outcome of the investigation into the crash of a Russian passenger jet.
In its statement, emailed late Monday, the embassy says it will issue another message when the security measure is lifted.
The Russian jet, flying from the Egyptian resort of Sharm El-Sheikh to St. Petersburg, crashed over the Sinai Peninsula on Saturday, killing all 224 people onboard.
The cause of the crash is not known. Mystery and confusion surrounds the flight's final moments and speculation includes a technical problem, structural failure, fire, bomb or an attack by Islamic militants on the ground.