THE ATTACKS: Computer systems at two major Gulf energy companies were recently crippled.
SUSPECTED: Security technicians believe highly targeted virus attacks were to blame, though the companies aren't saying. Questions remain about the source of the strikes.
IMPACT: The computer disruptions at state oil giant Saudi Aramco and Qatari natural gas producer RasGas do not appear to have affected oil and gas production. Yet they highlight another risk to the security of energy supplies in the Persian Gulf region.