PARIS - US Secretary of State John Kerry said on Thursday that Saudi-led talks to try to unite Syria's opposition groups had made progress. 'The meeting in Saudi Arabia appears to be very constructive at this point ... but I think everybody is moving in the direction that they want to rapidly get to a political process,' Kerry said on the sidelines of climate talks in Paris. 'So we made progress but we have some tough issues to get over,' he said. A possible Dec. 18 meeting on Syria in New York was 'not locked in yet' and sides were awaiting the outcome of the Saudi talks, he added.