President Denis Sassou-Nguesso has won a new five-year term with more than 60 percent of the vote, Interior Minister Raymond Zephyrin Mboulou said Thursday, but the opposition rejected the outcome, raising accusations of fraud and calling for civil disobedience. A coalition of five opposition candidates said that its own results showed Mr. Sassou-Nguesso headed for defeat. It was expected to provide its own vote tally on Friday.