Zimbabwe's disputed election sparks fraud claims as Mnangagwa retains power

President Emmerson Mnangagwa declared winner of Zimbabwe's election amid opposition accusations of fraud.
Mnangagwa received 52.6% of votes while main challenger Nelson Chamisa got 44%, extending ZANU-PF's decades-long rule.
Observer groups cited pre-election intimidation and irregularities though Mnangagwa denies allegations of rigging.
Opposition pledges legal challenge over "blatant fraud" but Mnangagwa dismisses doubts, saying critics should take complaints to court.
Disputed outcome raises concerns regionally and internationally over Zimbabwe's crisis of economic decline, debt, and instability.