A Saudi security officer monitors live feed screens showing Muslim pilgrims in the holy city of Mecca.
Saudi Arabia confirmed to Bloomberg that several government agencies have been targeted, including Saudi's General Authority of Civil Aviation. Thousands of computers were destroyed in the Saudi air office.
The Bloomberg report says a "digital bomb" was detonated inside the systems of several agencies at once and the government is now reviewing other branches of the government for traces of the same cyber weapon.
A source told Bloomberg that early evidence suggests the attacks came from Iran, although the attack may simply have been made to look like it came from Iran.
The attacked used the same malware programme, known as Shamoon, that attacked the Saudi Arabian oil company Aramco in 2012.