The announcement came after several days of uncertainty about the release of the pair, who were believed to have been held by al-Qaeda-affiliated militants.
The elections in Mali have been repeatedly delayed, eroding trust in institutions as the country struggles with a militant revolt that has claimed thousands of lives and forced hundreds of thousands from their homes.
The decision clears the way for President Ibrahim Boubacar Keita to be inaugurated next month for a second five-year term following an election process that the opposition has labelled flawed.
Soumaila Cisse lost in a landslide to incumbent President Ibrahim Boubacar Keita, picking up just 33 percent of the vote in an election in which only 34 percent of a politics-weary electorate voted.
Counting is under way in some of the 23,000 polling stations across the West African nation to determine if incumbent Ibrahim Boubacar Keita will remain in office who is challenged by Soumaila Cisse.
Polls have opened in the run-off presidential election of the West African nation of Mali with voters having to decide between incumbent Ibrahim Boubacar Keita and challenger Soumaila Cisse.
Three members of a "commando" cell who were planning attacks in capital Bamako this weekend have been arrested, say Mali's security forces.
Ministry of Territorial Administration figures showed that, of the roughly 23,000 polling stations, 4,632 were disrupted by "armed attacks or other violence," of which 644 were unable to operate in Mali.
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