President of Burundi's opposition political coalition Amizero y'Abarundi, Pierre-Celestin Ndikumana, speaks to the press, on May 24, 2018, outside the Constitution Court in Bujumbura after filing a petition challenging the results of the May 17 referendum. AFP PHOTO
Burundi's opposition on Thursday filed a petition to the country's constitutional court in a bid to invalidate the result of last week's referendum, which is expected to strengthen President Pierre Nkurunziza's hold on power.
Seventy-three per cent of voters cast their ballot for "Yes" in the May 17 referendum to change the constitution, in a move that could give Nkurunziza the option to stay in power until 2034.
