Major powers will meet again in two weeks' time for another round of talks on a political solution to the Syrian war, French Foreign Minister Laurent Fabius said Friday.

"We discussed all issues, even the most difficult," he told reporters after an initial round of talks, which for the first time brought together all the main foreign actors in the conflict.

"There are points of disagreement, but we advanced enough for us to meet again, in the same configuration, in two weeks," he added.