Japan's Ministry of Finance said it remains vigilant and is in close contact with the US Treasury.

The Russian military said Ukrainian drones carried out overnight strikes on an oil refinery in Saratov, triggering a fire. Ukrainian forces said they destroyed the refinery and also attacked a nearby air base that hosts Tu-95 long-range strategic bombers Russia uses to launch cruise missiles at Ukraine. Russia said its forces struck infrastructure in the Ukrainian port city of Mykolaiv, hit two vessels carrying military cargo, and struck a ship in the Black Sea. Saratov is about 730 km southeast of Moscow and more than 1,000 km from Kyiv.

Air-raid sirens sounded in Kyiv.