The petrol giant Shell has thoroughly infiltrated the Nigerian government, newly leaked WikiLeaks documents show. The multinational corporation inserted its employees into every key government ministry to gain unparallelled influence in policy-making in the oil rich Niger Delta, a revelation that is only the latest chapter of Shell's deeply troubled history in Nigeria. A US embassy cable released by the WikiLeaks whistle-blower website alleges that Royal Dutch Shell's top manager in Nigeria claimed the oil company had sources inside of "all relevant ministries" involving its business.