Deals of the day-Mergers and acquisitions

May 31 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1030 GMT on Thursday: ** Italy's oil and gas major Eni is in the process of reducing its stakes in its oilfields in Mexico and Indonesia, Chief Financial Officer Massimo Mondazzi said. ** Integrated energy group Sembcorp Industries has agreed to buy UK Power Reserve, Britain's largest flexible power generator, for 216 million pounds ($288 million). ** Greek electricity utility Public Power Corp (PPC) invi