"At the moment we have not been informed about the date of a new round of Geneva talks. The date of the negotiations has not been scheduled officially. De Mistura said that the negotiations would take place in August," George Sabra said.
Syria has been mired in civil war since March 2011, with government forces loyal to Syrian President Bashar Assad fighting numerous opposition factions and extremist groups.
The Syrian government delegation, as well as three opposition groups — the Riyadh-formed HNC, the Moscow-Cairo and the Hmeimim groups — have been taking part in the UN-mediated Geneva talks on peaceful settlement of the conflict.
The latest round of the talks took place in Geneva on April 13-27. The HNC walked out of the negotiations, citing the continuous fighting in Syria and the lack of progress on humanitarian issues.