Some civilians who have been holed up in houses near fighting being waged at a steel plant in the Ukrainian city of Mariupol were evacuated via a humanitarian corridor established on Saturday and Sunday, according to the Russian Ministry of Defense.

At least 46 people were allowed out of the heavily bombed port city when they emerged from houses near the Azovstal steel plant, where Ukrainian forces have been staging a last stand against Russian troops ringing the facility, the Russian Ministry of Defense said Sunday.

The civilians emerged from their houses during a period of calm in the fighting at the steel plant, according to the Russian military.

"Twenty-five local residents came out in the afternoon of April 30. At nightfall, taking the advantage of the regime of calm, a second group of 21 people came out and was taken to the populated locality of Bezimenne," the Russian Defense Ministry said.

The two groups of civilians came out "as a result of establishing a regime of calm and opening a humanitarian corridor from the residential houses nearest to the grounds of the Azovstal integrated steel works," the defense ministry's statement said.

Ukrainian President Volodymyr Zelenskyy confirmed on Twitter Sunday that the "evacuation of civilians from Azovstal began." Zelenskyy said about 100 civilians were evacuated from the plant on Sunday and that the U.N. is working on evacuating others.

A Red Cross representative told the Associated Press at least 20 civilians were evacuated from the Azovstal steel plant amid a temporary cease-fire observed by Ukrainian and Russian forces. A journalist for the AP reported seeing women and children arriving in Bezimenne, which is controlled by Russian-backed separatists in eastern Ukraine.

The AP reported the newly arriving evacuees were placed in a refugee tent camp and are expected to be escorted to the Ukrainian-controlled city of Zaporizhzhia by U.N. and Red Cross vehicles.

Several previous attempts to establish humanitarian corridors out of Mariupol have failed. Ukrainian officials claimed the previous evacuation were not successful because Russian troops did not follow through with the planned ceasefires.

House Speaker Nancy Pelosi this weekend told Ukrainian President Volodymyr Zelenskyy that additional U.S. support "is on the way."

"We are here to say to you that we are with you till this fight is over," Pelosi said during their meeting in Kyiv, according to a video released by her office on Sunday.

Pelosi, who traveled with a congressional delegation, is the highest-level U.S. official to visit Ukraine since Russia invaded on Feb. 24. Her delegation’s trip was previously unannounced.

"Our delegation traveled to Kyiv to send an unmistakable and resounding message to the entire world: America stands firmly with Ukraine,” Pelosi said in a statement after the meeting.

“When we return to the United States, we will do so further informed, deeply inspired and ready to do what is needed to help the Ukrainian people as they defend democracy for their nation and for the world,” Pelosi said.

House Speaker Nancy Pelosi led a delegation of representatives to meet with Ukrainian President Volodymyr Zelenskyy in war-torn Kyiv.

“We believe that we are visiting you to say thank you for your fight for freedom,” Pelosi said in a video posted by Zelenskyy on social media early Sunday morning.

Actress Angelina Jolie visited Lviv, Ukraine, on Saturday, meeting with officials and posing for photos with children at a railway station.

Jolie is a special envoy for the U.N. High Commissioner for Refugees. More than 12 million people have fled their homes in Ukraine and more than 5 million have fled to neighboring countries, U.N. Secretary-General Antonio Guterres said Friday.

The Lviv Regional State Administration shared photos of Jolie being informed about the situation in the area as did several residents of the city, including those at a bakery, Lviv Croissants, where the actress stopped.

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.