The three Saudi citizens who were injured at the blast incident which took place in Cairo on Sunday returned to the Kingdom last night after recovery. They were welcomed at King Khalid International Airport by Egyptian ambassador to the Kingdom Mahmoud Auf, and a number of officials. Speaking on the occasion, the Egyptian ambassador said investigations were underway on the incident which led to the killing of a French tourist and injury of 24 persons of different nationalities. While slamming the blast incident, the ambassador ruled out whether the incident would have an adverse impact of the tourism activity in his country.