Kremlin says duration of Astana talks 'uncertain'

"It is uncertain now how long the talks will last. Preparations are being conducted quite intensively," said Peskov.

Negotiations to reach a political resolution to the six-year war in Syria are due to begin in the Kazakhstan capital Astana between Syrian government and opposition negotiators on Jan. 23.

Following last month's Syria cease-fire deal brokered by Turkey and Russia, the Astana meeting comes as part of ongoing efforts by the two countries to promote a political solution in war-torn Syria.

Anadolu Agency