The U.S. Embassy in Damascus — which suspended operations in 2012 — said in a Monday post to X that the “security situation in Syria continues to be volatile and unpredictable with armed conflict and terrorism throughout the country.”

U.S. citizens, it said, “should depart Syria if possible. U.S. citizens who are unable to depart should prepare contingency plans for emergency situations and be prepared to shelter in place for extended periods.”

U.S. officials have said they are in touch with the most prominent rebel groups now building a transition government after toppling former president Bashar Assad’s regime, but the eventual shape of U.S.-Syrian relations remains unclear.

Hayat Tahrir al-Sham — the most prominent of the rebel groupings — has roots in al-Qaeda and is still listed as a terrorist organization in the U.S. and European Union. Its leader, Ahmed al-Sharaa, better known by his nom de guerre Abu Mohammed al-Jolani, is still the subject of a $10 million U.S. bounty.

The U.S. government “is unable to provide any routine or emergency consular services to U.S. citizens in Syria,” the embassy said. “U.S. citizens in Syria who are in need of emergency assistance to depart should contact the U.S. Embassy in the country they plan to enter.”

The embassy urged citizens in Syria to be “prepared to shelter in place should the situation deteriorate” and to ensure access to all required travel documents.