Western powers are looking to establish contact with Syria's new rulers, aiming to avoid Iraq- or Libya-style chaos after the fall of the Assad regime to Islamist-led rebels.
Europe's top diplomat Kaja Kallas was heading to Damascus on Monday, after a number of countries, including the United States, announced they had made initial approaches.
The situation in Syria, long allied with Iran and Russia, remains volatile and Western nations are wary of the Al-Qaeda roots of Hayat Tahrir al-Sham (HTS) that seized power in a lightning offensive.