Ukrainian forces have killed 225 Russian fighters and injured another 306 in the past 24 hours in the Bakhmut area, according to Serhiy Cherevaty, the spokesman for the Eastern Group of Forces of the Ukraine army.

Russia and Ukraine have been locked in a brutal battle for the city in eastern Ukraine for months, with both sides seeing high rates of casualties.

Cherevaty said that in the last day, the occupiers in the area of Bakhmut and nearby villages -- including Orikhovo-Vasylivka, Bohdanivka and Ivanivskoho -- tried to attack Ukrainian positions 42 times. There were 24 combat clashes in the Bakhmut area alone.

In total, in the Bakhmut direction, the occupiers shelled Ukrainian positions 256 times with various types of artillery and multiple launch rocket systems, Cherevaty said. Of them, 53 shellings were in the area of Bakhmut itself.

-ABC News' Will Gretsky

Russia is working to increase its weapons production amid an "urgent" need, President Vladimir Putin said Wednesday.

"Prosecutors should supervise the modernization of defense industry enterprises, including building up capacities for the production of an additional volume of weapons. A lot of effort is underway here," Putin said at a meeting of the Collegium of the Prosecutor General's Office of the Russian Federation.

Putin added that the weapons, equipment and ammunition are "urgently" needed.

-ABC News' Will Gretsky

Poland may send Ukraine MiG-29 fighter jets in the next four to six weeks, Prime Minister Mateusz Morawiecki said on Tuesday, according to Reuters.

Poland has previously said it would consider sending the Soviet-designed fighter jets to Ukraine.

When asked during a press briefing Tuesday how long it could take to supply the aircraft, Morawiecki said, "That could happen in the coming 4 to 6 weeks," according to Reuters.

The White House is welcoming reports that Chinese President Xi Jinping plans to soon speak with Ukrainian President Volodymyr Zelenskyy for the first time since Russia’s invasion began, while cautioning that after speaking with Ukrainian counterparts, "they have not yet actually gotten any confirmation that there will be a telephone call or a video conference."

"We hope there will be," national security adviser Jake Sullivan said during a briefing on Air Force One. "That would be a good thing because it would potentially bring more balance and perspective to the way that the new PRC is approaching this, and we hope it will continue to dissuade them from choosing to provide lethal assistance to Russia."

"We have been encouraging President Xi to reach out to President Zelenskyy because we believe that PRC and President Xi himself should hear directly the Ukrainian perspective and not just the Russian perspective on this," Sullivan continued. "So, we have in fact, advocated to Beijing that that connection take place. We've done so publicly and we've done so privately to the PRC."

Sullivan said the U.S. has “not yet seen the transfer of lethal assistance of weapons from China to Russia," after previously warning it was being considered.

"It's something that we're vigilant about and continuing to watch carefully," he added.

-ABC News' Justin Gomez

Russian President Vladimir Putin acknowledged Russian military losses from its ongoing invasion of Ukraine during his annual meeting with the federal security service Tuesday.

"Unfortunately, comrade officers, we know that there are losses in our ranks," Putin said.

Putin called on the FSB to provide "support" to the families of soldiers who have died in the war.

"We will always remember their heroism and bravery," he added.

Putin did not say how many soldiers have died in the war and the Russian Ministry of Defense hasn't disclosed an exact number of losses since September 2022 when Defense Minister Sergey Shoigu said just shy of 6,000 troops had died.

Secretary of State Antony Blinken and other State Department officials said Russia has likely suffered 200,000 injured or dead soldiers since the start of the war.

Putin also called on the FSB to make sure its border guard "undertake special efforts to control the Russian state border with Ukraine."

A "special group" is currently deployed at the Russia-Ukraine border, made up of border agencies, the FSB air arm, the Russian Armed Forces and the Russian National Guard, according to Putin.

"Your mission is to prevent any incursions by sabotage groups and stop any attempts to smuggle weapons and ammunition into Russia," Putin told the FSB board.

-ABC News' Tanya Stukalova and Anastasia Bagaeva