Cairo. Two Vietnamese tourists were killed and 12 other people were injured when a bomb blast hit their bus on Friday less than 4 kilometers from Egypt's world famous Giza pyramids, authorities said.

Ten of the injured were Vietnamese tourists and two were Egyptians – the driver and a tour guide, the interior ministry said in a statement.

The bus was hit by an explosion from an improvised device hidden near a wall on Marioutiya street at around 6.15 local time, the ministry said.

About two hours later the bus could be seen behind a police cordon with one of its sides badly damaged and the windows blown out, a Reuters reporter said.

Dozens of police and firefighters were at the scene, on a narrow sidestreet close to the ring road.

Police are investigating, the ministry said.

Reuters