Caracas, Venezuela (CNN) -- Venezuela's Supreme Court has upheld the country's presidential election results, ruling Wednesday against the opposition candidate's challenge. The court also rejected a claim disputing President Nicolas Maduro's Venezuelan citizenship -- ending one avenue members of the opposition had pursued to challenge the legitimacy of his presidency. After the closely watched April election to pick Hugo Chavez's successor, officials said Maduro won 51% of the vote. Maduro, Chavez's political heir, was sworn in as president at an April 19 inauguration ceremony. Opposition candidate Henrique Capriles Radonski had argued that the results were illegitimate and called for new elections.
@highlight
NEW: The court also rejects a claim disputing the president's citizenship
@highlight
Opposition candidate Henrique Capriles Radonski had challenged results
@highlight
Supreme Court ruling upholds April's presidential election
@highlight
Venezuelan President Nicolas Maduro was sworn in April 19
Maduro has stressed that he won a clear majority of votes in the election and accused @placeholder and his supporters of inciting violence.