The U.S. Embassy in Kyiv issued a warning on May 9, 2025, about the high probability of a major air attack on Ukraine in the coming days, citing intelligence data. In a statement published on the embassy’s website, American citizens were advised to be prepared to take immediate shelter in the event of an air raid alert. The threat is related to ongoing Russian strikes on Ukrainian infrastructure and the recent escalation.

"The U.S. Embassy in Kyiv has received information about a potentially serious air attack that could occur at any time over the next few days. The Embassy, ​​as always, advises U.S. citizens to be prepared to take immediate shelter in the event of an air raid alert," - it is told in the message.

No details are given on this matter. However, it should be noted that the ceasefire previously announced by the Russian side ends on the night of May 10-11.