The attack came as U.S. Secretary of State Anthony Blinken visited Ukraine’s capital, where he was expected to announce more than $1 billion in new aid.
The United States military warned that days of fighting between rival U.S.-backed groups in east Syria may help the resurgence of the Islamic State group.
Niger’s junta told a top U.S. diplomat they would kill deposed President Mohamed Bazoum if countries attempted military intervention to restore his rule.