Despite the increased activity, Russian forces have made no major gains in the last 24 hours as Ukrainian counterattacks continue to hinder their efforts, according to the UK Ministry of Defense.

Russian air and maritime forces have not established control in either domain, owing to the effectiveness of Ukraine’s air and sea defense.

Despite their stated conquest of Mariupol, heavy fighting continues to take place frustrating Russian attempts to capture the city, further slowing their desired progress in the Donbas.

United Nations Secretary-General Antonio Guterres will meet with Ukrainian President Volodymyr Zelenskyy and Foreign Minister Dmytro Kuleba in Kyiv on April 28.

Guterres will also meet with staff of U.N. agencies to discuss scaling up humanitarian assistance to the people of Ukraine.

The Russian Defense Ministry announced that one servicemember died and another 27 crew members went missing from its Black Sea Fleet flagship vessel Moskva last week.

"The remaining 396 crew members were evacuated from the cruiser to the ships of the Black Sea Fleet," the defense ministry said Friday.

The warship sank on April 14 following what the Ukrainians claimed was a missile attack. Russia did not acknowledge an attack on the ship and continued to say a fire broke out after ammunition detonated.

The defense ministry's latest announcement contradicts its earlier statement that all Moskva crew members had been rescued.

-ABC News' Somayeh Malekian

More than 20 countries have accepted an invitation to attend a Ukraine-focused defense talk on Tuesday hosted by the U.S., Pentagon press secretary John Kirby said Friday.

More than 40 NATO and non-NATO countries have been invited to the talks, which will be hosted by U.S. Defense Secretary Lloyd Austin at Ramstein Air Base in Germany, Kirby said.

"The goal is to bring together stakeholders from all around the world for a series of meetings on the latest [Ukrainian] defense needs and … ensuring that Ukraine’s enduring security and sovereignty over the long-term is respected and developed,” Kirby said.

-ABC News' Somayeh Malekian

At least one person -- a journalist -- was killed in a rocket attack on a residential building in Kyiv on Thursday evening, ABC News has learned.

Kyiv Mayor Vitali Kilitschko said Friday that rescuers had found the body of a victim amid the rubble.

Radio Liberty, a service of the U.S.-funded Radio Free Europe/Radio Liberty, reported that one of its employees, Vira Gyrych, was killed when a Russian missile hit her apartment in the Ukrainian capital on Thursday. Her body was found beneath the wreckage Friday morning, according to the report.

Gyrych had worked as a journalist and producer for Radio Liberty's Kyiv bureau since 2018. Prior to that, she worked for leading Ukrainian television channels, according to Radio Liberty.

"The editorial staff of Radio Liberty expresses its condolences to the family of Vira Gyrych and will remember her as a bright and kind person, a true professional," Radio Liberty said in its report.

Israeli Ambassador to Ukraine Michael Brodsky also confirmed Gyrych's death in a Twitter post, saying she was a former employee of the Israeli embassy in Kyiv.

Thursday's rocket attack came as United Nations Secretary-General Antonio Guterres visited Kyiv. Five Russian missiles flew into the city, according to Ukrainian President Volodymyr Zelenskyy. At least 10 people were injured, including four who were hospitalized, according to the Kyiv City Council.