Egypt's Prosecutor-General Nabil Sadek ordered on Friday night an urgent investigation into the deadly explosion of an IED earlier in the evening in El-Haram, Giza, which left three Vietnamese tourists and their tour company representative dead and 11 injured on a tourist bus traveling on El-Maryoutiya Street.

The injured included 10 of the 14 Vietnamese tourists on the bus, as well as the Egyptian bus driver.

The Prosecutor-General tasked the Supreme State Security Prosecution and the Southern Giza Prosecution with conducting the necessary inspection of the explosion scene and interviews of eye witnesses and survivors.

Sadek also ordered the completion of an urgent autopsy report for those killed.

Sadek also ordered prosecutors to conduct forensic investigations to determine the nature of the material used to make the IED, and to impound all surveillance cameras in the vicinity of the explosion.