Moscow/Kyiv | Reuters: Ukraine acknowledged on Friday it was taking heavy losses in Russia's assault in the east, but said Russia's losses were even worse, as U.S. President Joe Biden called on Congress to send as much as $33 billion to help Kyiv withstand the attack.

Top developments:

FIGHTING AND CASUALTIES

* A journalist from the U.S.-backed broadcaster Radio Liberty was killed by a Russian missile strike that occurred while the U.N. Secretary-General was in Kyiv.

* Russia said the missiles destroyed a rocket plant, and a U.S. official confirmed the attack had targeted military production, withough saying if those targets were destroyed.

* Russia said it used a diesel submarine in the Black Sea to strike Ukrainian military targets with Kalibr cruise missiles, the first time Moscow has announced the use of its submarine fleet to hit its neighbour.

* Ukrainian President Volodymyr Zelenskiy's office said Russia was pounding the entire front line in the eastern Donetsk region with rockets, artillery, mortar bombs and aircraft to prevent the Ukrainians from regrouping.

* A border checkpoint at a village in Russia's Bryansk region bordering Ukraine came under mortar fire from Ukrainian territory, the regional governor said. Reports of battlefield developments could not be immediately verified by Reuters.

* Russia's defence ministry released a video showing an injured British man captured in Ukraine being questioned by unidentified Russian forces.

WEST'S RESPONSE

* U.S. President Joe Biden called on Congress to send as much as $33 billion to help Kyiv withstand the attack.

*Germany is considering sending long-ranged howitzers to Ukraine.

* NATO is ready to maintain support for Ukraine for years in the war against Russia, Secretary-General Jens Stoltenberg said.

* The United States does not believe that there is a threat of Russia using nuclear weapons despite a recent escalation in Moscow's rhetoric, a senior U.S. defense official said.

HUMAN AND ECONOMIC IMPACT

* In the southeastern port city of Mariupol devastated by a Russian siege, residents recounted the horrors of the battle as they sifted through rubble.

* After consultations U.N. Secretary General Antonio Guterres, Ukraine said it hoped to evacuate civilians in Mariupol holed up in a vast steel works along with the last defending Ukrainian troops.

* The bodies of 1,150 civilians have been recovered in Ukraine's Kyiv region since Russia's invasion and 50-70% of them had bullet wounds from small arms, Kyiv police said.

* Britain said it was sending experts to help Ukraine with gathering evidence and prosecuting war crimes.

QUOTE * "It was a massacre. It was the scariest thing when the shells were flying overhead. Shells, rounds and all such, you couldn't survive it. And yet we did," said Vitaliy Kudasov, 71, a resident of shattered Mariupol.

Posted By: Sugandha Jha