The Syrian government said on Tuesday that it had held final session of talks with the United Nations mediator in a 'useful and productive round'. Bashar Ja'afari, head of the Syrian government delegation, was speaking to reporters after meeting UN Special Envoy Staffan de Mistura on the day before the two-week round is due to end in Geneva. 'I can describe this particular round as useful and productive,' Ja'afari said, declining to take questions.