(Adds Cigna, ISS, Abu Dhabi National Oil, Haniel, Arconic, Papa John's)
Aug 24 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 2000 GMT on Friday:
** Enbridge Inc ENB.TO , Canada's largest pipeline operator, said it would buy its U.S. master limited partnership Spectra Energy (F:SEP) Partners SEP.N for a sweetened deal of $3.3 billion. Cigna Corp (NYSE:CI) CI.N shareholders voted in favor of the health insurer's proposed $52 billion acquisition of pharmacy benefit manager Express Scripts Holding Co ESRX.O , although the deal still needs clearance from antitrust authorities. Papa John's International Inc PZZA.O , the world's third-largest pizza delivery company, has hired Bank of America Corp (NYSE:BAC) BAC.N and Lazard Ltd LAZ.N to help find ways to stabilize the restaurant chain, which has come under pressure from its founder John Schnatter, people familiar with the matter said. State-owned Abu Dhabi National Oil Co (ADNOC) is in advanced talks with more than one potential buyer, including Italy's ENI ENI.MI , as it prepares to sell minority stakes in its refining business, two sources familiar with the matter said. Family-owned German investment group Haniel FHANI.UL has agreed to sell a 7.3 percent stake in retailer Metro AG B4B.DE to a Czech-Slovak investor group for an undisclosed sum, with the option of selling the rest of its holding at a later date. Aluminum products maker Arconic Inc ARNC.N is discussing acquisition offers for the entire company, even though it announced a sale process last month only for its building and construction systems unit, people familiar with the matter said. UniCredit CRDI.MI and Societe Generale SOGN.PA declined to comment on a report that Italy's biggest bank was working with a senior Rothschild banker to advise it on a possible merger with the French lender. Brazil antitrust agency Cade is considering imposing restrictions on the merger of Fibria Celulose SA FIBR3.SA and Suzano Papel e Celulose SA SUZB3.SA that would create the world's largest wood pulp producer, a Brazilian newspaper reported, citing sources. China Biologic Products Holdings Inc CBPO.O rejected a $3.9 billion offer from a consortium led by its former chief executive and said an affiliate of CITIC Capital had also withdrawn a competing bid. Talks between U.S. fund manager Guggenheim Partners and German reinsurer Munich Re MUVGn.DE have concluded without a deal, Bloomberg News reported. Shareholder advisory firm Glass Lewis & Co has recommended that shareholders of hotel owner LaSalle Hotel Properties LHO.N oppose the buyout by private equity firm Blackstone (NYSE:BX) Group LP BX.N , in a victory for LaSalle's unwelcome suitor Pebblebrook Hotel Trust PEB.N . Abu Dhabi's Sheikh Khaled bin Zayed Al Nehayan, cousin of Manchester City owner and Arab billionaire Sheikh Mansour bin Zayed Al Nahyan, failed in a 2 billion pounds ($2.55 billion) proposal to buy UK's Liverpool Football Club, the Daily Mail reported. Electra Private Equity ELTA.L has ended talks about a possible buyout of the company after failing to receive a firm offer from interested parties, it said. Australian pallets and container firm Brambles BXB.AX said it intends to demerge and list its IFCO Systems reusable-plastic-containers business and that it was also weighing selling IFCO, sending its shares to one-and-a-half-year highs. Platinum Equity is exploring a potential sale or initial public offering of Vertiv, a provider of backup power and fail-safe systems for data centers, which its private equity owner hopes will value the company close to at least $6 billion, according to sources familiar with the matter. Japan's Fair Trade Commission said it had approved the merger of two small regional banks after a lengthy review that had sparked a battle between the antitrust watchdog and financial regulators.