AFP: Oil-rich Gabon has decided to postpone indefinitely an auction of offshore drilling blocks planned for the end of this month pending security and environmental guarantees, officials said Wednesday. A spokesman for Mining, Oil and Hydrocarbons Minister Nkoghe Bekale linked the delay to the disaster in the Gulf of Mexico following an explosion aboard a a drilling rig. “The government wants to adopt a new approach rather than just launch into this operation,” spokesman Guy Martial …