May 28 (Reuters) - South Africa may take unspecified "interventions" in the gold and platinum sectors as part of a state plan to maintain the viability of the industries, mines minister Susan Shabangu said on Tuesday. br br "I have directed my officials to urgently explore all available avenues and develop a rescue plan," she said in a speech to parliament. br br There would be a "particular focus on both supply and demand-side interventions," she said.