Deputy foreign minister Gennady Gatilov said this month that members of Syria's exiled opposition National Coalition, which did not take part in the first round of talks in January, were "considering coming to Moscow" for the next meeting.
Gatilov said the UN's Syria peace envoy Staffan de Mistura would also take part in the talks.
In January discussions between around 30 opposition members -- from groups tolerated by Damascus authorities -- and representatives of Assad's regime, were described as an "initial, consultative meeting" by the head of the government delegation Bashar al-Jaafari.
The Syrian government and some opponents agreed to a list of ten points called the "Moscow principles".
The document stipulated that a solution to the conflict should be found "politically and peacefully", must reject foreign interference and call for sanctions to be lifted.
Two previous rounds of talks in Geneva ended without success, the last of which took place in February 2014.
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Gatilov said the UN's Syria peace envoy Staffan de Mistura would also take part in the talks.
In January discussions between around 30 opposition members -- from groups tolerated by Damascus authorities -- and representatives of Assad's regime, were described as an "initial, consultative meeting" by the head of the government delegation Bashar al-Jaafari.
The Syrian government and some opponents agreed to a list of ten points called the "Moscow principles".
The document stipulated that a solution to the conflict should be found "politically and peacefully", must reject foreign interference and call for sanctions to be lifted.
Two previous rounds of talks in Geneva ended without success, the last of which took place in February 2014.
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