Happening now breaking news.

Ukrainian officials say the second phase of Russia's war has begun in the east with

the critical battle for the Dunbarz region now underway. This as officials

warned no part of Ukraine is safe from the Kremlin's brutal onslaught after deadly

new strikes on the Western city of Lviv. Also breaking, the first image is just a bird of a significant

military embarrassment from Moscow showing a Russian warship on fire before it sunk in the

Black Sea last week.

Our correspondence are standing by in Ukraine with war refugees in Estonia

and over at the White House.

We want to welcome our viewers here in the United States and around the world.

I'm Wolf Blitzer, you're in the situation room. This is CNN breaking news.

We begin with Russia's escalating offensive in eastern Ukraine as top Ukrainian officials

are now confirming that the battle for the Dunbar region has begun.

Let's go right to our chief national security correspondent Jim Shuto, he's back in Ukraine for us.

He's reporting from Lviv, Jim, President Zelinsky is now

speaking out about this new phase of the war. That's right. U.S. intelligence

had assessed at the end of March, as we reported, of a major strategy shift by Russia to stop focusing on its failed attempt to capture the capital Kieve and focus its forces on the east and the south. We've been seeing

those forces move over the last couple of weeks. Now they are there and now that

battle, though it never quite stopped there, but that battle intensifying to a

degree we have not seen before and and what's different about this wolf is that

partly due to the terrain the flat terrain they expect a different kind of war there. Heavy armor, heavy

artillery, larger engagements between Ukrainian and Russian forces and sadly it may be even bloodier than we've witnessed so far during an already

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