Sudan is in the midst of a political crisis after security forces opened fire on pro-democracy protesters in the capital, Khartoum.
Representatives of the protesters had been in talks with the military over who will take control following the ousting of long-time President Omar al-Bashir.
Negotiations between the two sides have ground to a halt, and the military has scrapped all agreements with the opposition, saying it will hold elections within nine months.
This has angered the protest movement, which had insisted on a transition period of at least three years so it could ensure the elections are free and fair.
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