The U.S. imposes further sanctions on Syrian President Bashar al-Assad and his 19-year-old son Hafez, and warns that it will also sanction anyone who engages with the government in Damascus. Kelly Craft, U.S. ambassador to the United Nations, says the sanctions are not intended to harm civilians and that they do not target humanitarian aid.
The United States Department of State freezes funding to the White Helmets humanitarian group, which conducts urban search and rescue in rebel-held areas of Syria. The U.S. provides one-third of the group's total funding.
United Nations officials announce the creation of a new team in Geneva to investigate possible war crimes, crimes against humanity and genocide during the Syrian Civil War in order to prepare for future prosecutions of those responsible.
Iran confirms that Russia will stop using its Hamadan Airbase to launch attacks in Syria, saying Russia's use of Hamadan Airbase was "temporary, based on a Russian request," and that Russian operations are "finished for now". Iranian Defence Minister Hossein Dehghan earlier criticized Russia's announcement of its use of the base in Iran, saying "There has been a kind of showing-off and inconsiderate attitude behind the announcement of this news."
Amnesty International reports at least 200 civilians have been killed in Russian air strikes in Syria, indicating "serious failures by Russia to respect international humanitarian law". Moscow denies causing civilian deaths.
U.S. government officials say that they are willing to rewrite a proposed resolution to clarify that any operation would be limited in scope and duration and would not include the use of ground troops.