The official says a public transportation bus collided with a number of other vehicles at the entrance to a tunnel on a desert highway near the city of Beni Suef, about 95 kilometres south of Cairo. The bus caught fire after the crash.
The official says heavy fog had reduced visibility on the road. He spoke on condition of anonymity because he was not authorised to talk to the media.
Traffic accidents are common in Egypt due to badly maintained roads and poorly enforced traffic laws. WHO said in 2012 that road accidents kill about 12,000 people in Egypt every year.