At least four people were killed in a Russian attack, Ukraine said, amid concerns about air defenses after the U.S. said it was suspending military and intelligence aid.
Four people were killed when a Russian missile struck a hotel in Volodymyr Zelensky's home town but some American humanitarian volunteers survived the attack.
"During all this period, and last week, you stayed with us," the Ukrainian president tells European leaders in Brussels.
The Ukrainian leader says he will travel to Saudi Arabia where talks on bringing a "lasting" peace will take place.