Major Serhiy Volyna, commander of the 36th Separate Marine brigade, issued a desperate plea to world leaders in a Facebook video from the besieged city of Mariupol.

This is our appeal to the world. This could be the end of our lives. Volyna said that we are probably facing our last days. Russia wants the city to surrender by 2 p.m. 6:30 a.m. Ukrainians refused to meet a surrender deadline. Mariupol has been cut off from food, water, and heating since early March.

The enemy is outnumbering us by 10 to one. They have an advantage in the air, in their forces on land, in equipment and in tanks.

Volyna posted the video on his personal Facebook page. NBC did not verify the information.

Volyna wrote in a previous post that the wounded die in unbearable torment daily as medicines, disinfectants, and pain relief opportunities are long over.

The humanitarian situation in the eastern Ukrainian city, which had a pre-war population of around 500,000, is dire, Ukrainian officials and humanitarian organizations say. There are at least 100,000 people trapped there. Attempts to open humanitarian corridors to allow civilians to escape have failed.

There is a person namedNatasha Turak.

Employees work on a freight train loaded with coal at a coal reserve center in China. China imported less coal from Russia in March.

Hu Guolin is a member of the visual China group.

China imported less coal from Russia in March than it did a year ago due to worries of foreign sanctions and a decline in purchases of foreign coal, according to a report.

The news agency reported that the country's overall coal imports fell by 40% from last year due to record domestic output and government price caps.

Chinese traders had difficulty securing financing from state banks on the eve of possible sanctions on Russia, so they trimmed Russian coal imports.

The European Union could ban Russian coal. Chinese traders have sought cheap cargos and looked to pay in yuan in order to circumvent the international SWIFT transaction system, according to a report.

There is a person named CHELSEA ONGA.

The city of Mariupol will have to surrender by 2 p.m., according to Russia. Moscow time is at 7 a.m. In a statement early Wednesday morning, it said it would offer the option of stopping fighting and laying down their weapons to the Ukrainians.

Ukrainian forces in the city ignored an ultimatum to surrender by last Sunday, April 17 and have pledged to fight until the end.

Mariupol is just 30 miles from the Russian border and is seen by Moscow as crucial territory that would allow it to establish a land corridor between the two unrecognized republics of the Russian Federation.

There is a person namedNatasha Turak.

A Ukrainian serviceman stands guard at a checkpoint on the outskirts of Barvinkove. Russia's military build-up on the eastern border of Ukraine continues to increase, according to the British defense ministry.

The Afp has a picture ofRonaldo Schemidt.

The British defense ministry said in an intelligence update that Russia is trying to disrupt the movement of Ukrainian reinforcements and weaponry to the east of the country.

Russian air activity in northern Ukraine is likely to remain low, according to the ministry.

There is still a risk of precision strikes against priority targets.

Russia's military build-up on the eastern border of Ukraine continues, the ministry said.

There is a person named CHELSEA ONGA.

Ukrainian President Volodymyr Zelenskyy said in his nightly video address that Russia is blocking efforts to organize humanitarian corridors in Mariupol.

The situation in Mariupol remains the same. He said that Ukraine had not heard from Russia about the exchange offer.

Russian forces are trying to deport Mariupol's residents.

The fate of tens of thousands of Mariupol residents who were relocated to Russian-controlled territory is unknown.

People rest near a residential building that was damaged in Mariupol. Zelenskyy said the situation in Mariupol is as bad as possible.

Victor is a news agency.

Zelenskyy said that Russia has increased its intensity of fire in the direction of Kharkiv and the Dnipropetrovsk. The two pro-Russian self-declared "republics" of Luhansk and Donetsk make up the Donbas region.

He said that they still consider ordinary housing infrastructure normal targets.

Russia's full offensive against the Donbas region has begun, with a top official saying it is the second phase of the war.

Zelenskyy once again called for more military aid.

He said that if we had access to all the weapons we needed, we would have ended the war.

There is a person named CHELSEA ONGA.

The British government said in an intelligence assessment Tuesday night that the Russian troops are dealing with the same problems as in the first phase of the war.

According to the U.K. Ministry of Defence, Ukrainian troops have repulsed numerous attempted advances in the eastern Donbas region. In a video address on Monday, Zelenskyy said that Moscow had begun striking Ukrainian targets.

A mother holds her daughter at the funeral of her husband, a Ukrainian soldier, who was killed in the Donbas area of Ukraine. Moscow is concentrating its attacks on the region.

Joe Raedle is a news photographer.

The Donestsk and Luhansk provinces are in the Donbas area of eastern Ukraine.

Russia's ability to progress continues to be impacted by the environmental, logistical and technical challenges that have beset them so far, combined with the resilience of the highly-motivated Ukrainian armed forces.

CNBC was unable to independently confirm the British assessment, though it is known that Russian troops have redeployed to the east.

CNBC requested comment from the press office of the Russian Ministry of Defense.

Ted Kemp.