Al Qaeda claimed responsibility for the failed attempt at the largest fuel processing facility at Abqaiq where 2/3 of Saudi's export is processed. Two suicide bombers in a car tried to force their way into the facility but were shot down by security gunmen. The al Qaeda notice on a website said that they will "rid the Arabian Peninsular of the infields." Although Saudi officials were at pain to point out that production has not been affected, prices jumped by 10%. Some analysts believe that the attack was timed to coincide with the pressure on Nigerian oil from terrorists in that country and increased tensions with Iran. Eighth largest oil producer Nigeria, has dropped production by 20% and if economic sanctions are slapped on Iran over its nuclear weapons program, the world oil supply will reduce even further. There is increasing fear among strategists that terrorists will target economic targets such as oil refineries and ships. There is increased international cooperation and awareness of these threats and countries are investing in security and surveillance products to counter such threat perceptions.