Regime leader Bashar al-Assad said he is ready to negotiate on "everything" in proposed peace talks in Kazakhstan but said it was not yet clear who would represent the opposition and no date had been set.
Assad also said a ceasefire brokered by Turkey and Russia, his most powerful ally, ahead of the talks was being violated and the army's role was to recapture an area near Damascus where opponents control the main water supply for the capital.
He made the remarks in comments to French media that were published by the Syrian regme's news agency SANA.
Asked if the regime was ready to discuss Assad's position, he said "yes but my position is linked to the constitution". "If they want to discuss this point they must discuss the constitution," he said.
He indicated that any constitutional matter must be put to a referendum, and it was up to the Syrian people to elect the president.
