Agence France-Presse: Europe should freeze new deep water drilling until the causes of the rig explosion which triggered the oil spill in the Gulf of Mexico are known, a top EU official said Wednesday. EU Energy Commissioner Guenther Oettinger said governments need to make sure that the energy industry launches all possible measures to boost safety and enhance disaster prevention. “Utmost caution must be exercised for the moment with respect to new drillings,” Oettinger said, according to prepared …