Ukraine's presidential chief of staff says a three-month old infant is among the dead following a missile strike on an apartment block in Odesa.

Anton Gerashchenko, Adviser to the Minister of Internal Affairs of Ukraine, has claimed at least six people have been killed in the strike.

Ukraine’s foreign minister Dmytro Kuleba has condemned a Russian missile strike on a residential apartment in Odesa.

Kyiv officials claim the strike on Saturday has killed five people and left 18 people injured.

“The only aim of Russian missile strikes on Odesa is terror. Russia must be designated a state sponsor of terrorism and treated accordingly. No business, no contacts, no cultural projects. We need a wall between civilization and barbarians striking peaceful cities with missiles,” wrote on Twitter.

At least five people were killed and 18 injured in a missile strike on Ukraine's southern port city of Odesa on Saturday, the president's chief of staff Andriy Yermak said in an online post.

Ukraine's southern air command had earlier said that two missiles struck a military facility and two residential buildings in Odesa.

The rituals leading up to Easter are the same. The solemn Good Friday processions. The Holy Saturday blessings of foods that were avoided during Lent. The liturgies accompanied by processions, bells and chants.

But while Easter is the holiest of holy days on the church calendar, marking the day Christians believe Jesus triumphed over death, many members of Ukrainian Orthodox churches across the United States are finding it difficult to summon joy at a time of war.

Nearly two months into the Russian-Ukraine war, the Kremlin has taken extraordinary steps to blunt an economic counteroffensive from the West. While Russia can claim some symbolic victories, the full impact of Western sanctions is starting to be felt in very real ways.

As the West moved to cut off Russia’s access to its foreign reserves, limit imports of key technologies and take other restrictive actions, the Kremlin launched some drastic measures to protect the economy.

These included hiking interest rates to as high as 20%, instituting capital controls and forcing Russian businesses to convert their profits into rubles.

Russian troops have attacked the Azovstal steel plant in Mariupol just two days after president Vladimir Putin ordered his generals not to storm it, Ukraine has said.

Oleksiy Arestovich, an adviser to Ukraine’s president Volodymyr Zelensky, said on Saturday that the Kremlin’s soldiers were laying siege to the steelworks, Ukraine’s last stronghold in the city, where thousands of Ukrainian soldiers and civilians are holed up.

“The enemy is trying to completely suppress resistance of the defenders of Mariupol in the area of Azovstal,” he said.

According to the national power grid operator, Fingrid, electricity imports from Russia to Finland will be limited due to the “risks to the power system in the changing international situation”.

Risks include possible attempts by Russia to influence Finland during the debate about Nato membership and the potential application process.