The US Embassy in Kyiv issued a security alert on Saturday, 23 May, warning that it had received information about a 'potentially significant air attack' on Ukraine that could occur within the next 24 hours. The embassy urged US citizens in Ukraine to be ready to shelter immediately if Ukrainian authorities sound an air raid warning.
Thewarningcame as President Volodymyr Zelenskyy said Ukrainian, US and European intelligence had detected signs that Russia may be preparing a broader strike, possibly involving the Oreshnik intermediate-range ballistic missile. Ukrainian officials warned that Kyiv could be among the possible targets.
Ukraine: The U.S. embassy in Kyiv has received information concerning a potentially significant air attack that may occur at any time over the next 24 hours. The embassy, as always, recommends U.S. citizens be prepared to immediately shelter in the event an air alert is…pic.twitter.com/iESI6IAHtA
The embassy'smessagewas brief but serious. It told US citizens to remain prepared to take shelter without delay if Ukrainian authorities sound an air raid warning. Ukrainska Pravda, citing the embassy's notice,reportedthat the alert referred to a possible large-scale Russian airstrike within 24 hours.
Such alerts are not unusual in wartime Ukraine, but this one drew attention because of its timing and wording. The phrase 'potentially significant' suggested that US officials had received specific enough information to warn the public, even without naming the exact target or weapon system.
Zelenskyy said Ukraine was checking intelligence that Russia was preparing to use the Oreshnik missile. He said the possible attack may form part of a combined strike involving several types of weapons, including missiles and drones.
The Oreshnik has become a symbol of Russia's effort to intimidate Ukraine and its Western partners. Reuters reported that Russia had already used the missile twice against Ukraine, first in November 2024 and again in January 2026, when it struck the Lviv region.
ZelenskyyurgedUkrainians to take air raid alerts seriously. He also called on Western partners to respond before an attack happens, not only after damage has been done.
The alert also followed a deadly incident in Russian-controlled Luhansk. Russian officials said a drone strike hit a student dormitory in Starobilsk, killing 18 people. Moscow blamed Ukraine and said President Vladimir Putin had ordered the military to prepare options for retaliation.
Ukraine denied targeting civilians. Its military said it had struck an elite drone command unit in the area and followed international humanitarian law. Reuters said it could not independently verify what happened.
Source: International Business Times UK
