Ukrainian officials say Russian missiles have hit a civilian container ship and killed seven people, at a port in a region called Odesa.
The region’s governor, Oleh Kiper, this is the third attack on a civilian vessel in the past four days.
He said Russia has been targeting port infrastructure and all victims are Ukrainian.
This latest strike coincided with a European tour by Ukraine’s President, Volodymyr Zelensky, who is visiting leaders in London, Paris and Rome.
He has met with UK Prime Minister Keir Starmer in Downing Street and will later meet with Nato’s new secretary general, Mark Rutte.