Lufthansa and Air France will be diverting flights around the Sinai Peninsula until they know why a Russian passenger plane crashed there Saturday, Reuters reports. "We took the decision to avoid the area because the situation and the reasons for the crash were not clear," a Lufthansa spokesperson says. "We will continue to avoid the area until it is clear what caused the crash." According to the AP, Air France cited similar safety concerns in its decision to avoid the Sinai Peninsula for the time being. Flights from both airlines will take other routes. The Russian passenger plane was traveling from Egypt to Russia when it crashed, killing all 224 passengers onboard, Reuters reports. (More Lufthansa stories.)