Russia and Ukraine exchanged over 200 prisoners of war on Tuesday, according to Ukrainian President Volodymyr Zelenskyy and Interfax, a Russian news agency.

During his daily evening address, Zelenskyy said 130 Ukrainians were "brought home from Russian captivity," including privates and sergeants from the army, navy and national guard.

"Just as we remember every corner of our country that is under occupation, we remember every single person in Russian captivity," he said.

Ninety Russians were released from the Ukrainian side back to Russia, though Russia said Ukraine originally agreed to release 160 Russians, Interfax reported.

"During the exchange of prisoners of war on Tuesday, the Ukrainian side agreed to return only 90 Russians, despite an earlier agreement on the exchange of '160 for 160,'" Tatyana Moskalkova, human rights ombudsman for the Russian Federation said, according to Interfax.

-ABC News' Ellie Kaufman

Up to 30,000 Russian soldiers have been killed or injured in Bakhmut over the last several months amid intense fighting in the eastern Ukrainian city, Western officials said in a briefing Tuesday.

The ratio of dead to injured was "unclear," said the officials, who described Ukraine’s refusal to withdraw from the city -- even though its forces are surrounded on three sides -- as "a sound tactic" given that "lots of Russians are being killed."

"What we're seeing is a horrific level of Russian casualties for minimal gains," they said, noting that an estimated 200,000 Russian soldiers have been killed or wounded overall since the war began.

In the past 24 hours, 244 Russian troops were killed and 315 wounded in Bakhmut, Serhiy Chevrevaty, a spokesman for Ukraine's eastern group of forces, said during a national telethon on Tuesday.

The officials refused to say how many Ukrainians have been killed or injured in and around Bakhmut but claimed it was "significantly lower."

They also were unable to put a clear time frame on when a Ukrainian withdrawal might come, though noted the possibility of a Ukrainian counteroffensive should not be ruled out.

-ABC News' Tom Soufi Burridge

Thirteen people have been found dead since a rocket struck an apartment building in Zhaporizhzhia, Ukraine, authorities said.

The governor there has called for a national day of mourning on Monday.

The State Emergency Situation of Ukraine in Zaporizhzhia initially posted on their Telegram account Friday that seven people were dead.

So far, 11 people have been saved, and 20 people were able to evacuate the building.

-ABC News' Ellie Kaufman

U.S. Attorney General Merrick Garland made an unannounced visit to Ukraine on Friday at the invitation of the Ukrainian prosecutor general to join Ukrainian President Volodymyr Zelenskyy and other international partners at the United for Justice Conference.

Garland attended several meetings while he was there.

-ABC News' Alexander Mallin

The leader of of Russia's Wagner mercenary group appeared on Sunday to ditch plans to withdraw his forces from Bakhmut in eastern Ukraine after receiving promises overnight that they would get all the arms needed to capture the devastated city.

Yevgeny Prigozhin said in a new audio message that the Kremlin has promised to resupply his Wagner Private Military Company with as much ammunition and weapons as they need.

Prigozhin said that for the first time he received a response to the situation regarding the shortage of ammunition. He said on Saturday night that the relevant companies promised to deliver everything necessary to continue the offensive in Bakhmut.

"Overnight we received a combat order, for the first time in all this time," Prigozhin said. "We have been promised as much ammunition and weapons as we need to continue further operations. We have been promised that everything needed to prevent the enemy from cutting us off (from supplies) will be deployed on the flank," he added.

In addition, Russian Army Gen. Sergei Surovikin will personally deal with issues of interaction between the Wagner PMC and the Ministry of Defense, Prigozhin said. "This is the only man with the star of an army general who knows how to fight," Prigozhin said of the Russian Defense Ministry assigning Surovikin to work alongside Wagner.

Surovikin commanded Russia's Ukraine campaign for several months before the chief of the General Staff, Army Gen. Valery Gerasimov, was given overall operational command above him.