The crisis in Burundi continues with about six prominent deaths recorded in the past two weeks.
The African union is worried that the crisis risks spiraling into what they called a "catastrophe' both for the country and the wider region.
The latest murder of Colonel Jean Bikomagu, a former Chief of Staff, outside his home in Bujumbura on Saturday by unidentified gunmen most likely prompted the statement.
President Nkurunziza was declared winner of elections held in July, for a third term that both opponents and western powers said violated the Constitution and provisions of a peace deal which ended a 1993-2005 civil war between the Hutu majority and Tutsi minority.
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