Russian and Ukrainian officials said that Russia struck the Ukrainian port city of Odesa.
The mayor of Odesa said on Facebook that Russia hit critical infrastructure.
If Russian forces captured the Black Sea port city that is the main base for the Ukrainian navy, they could cut off access to the sea.
The failure of the campaign around Kyiv is expected to lead to an offensive on the south and east of the country.
The Russian defense ministry said it targeted oil facilities that were being used by the Ukrainians to supply their troops.
This morning, high-precision sea and air-based missiles destroyed an oil refinery and three storage facilities for fuel and lubricants near Odesa, from which fuel was supplied to a group of Ukrainian troops in the direction of Mykolaiv.
A group of reporters heard explosions in the port city.
A video posted on social media claimed to show the moment the strikes hit.
—OSINTdefender (@sentdefender) April 3, 2022
The governor of the Poltava region, Dmytro Lunin, said that the fire at the refinery has been extinguished, but the facility has been completely destroyed.
Ukrainian officials said there were no known casualties.
The city council of Odesa claimed on Telegram that Ukrainian forces shot down two Russian missiles.