Russia-Ukraine updates: US sanctions Russian military shipbuilder, diamond miner

Pope Francis will consecrate Russia and Ukraine to the Immaculate Heart of Mary on Friday, inviting people around the world to join him in the prayer.

"This Act of Consecration is meant to be a gesture of the universal Church, which in this dramatic moment lifts up to God, through His Mother and ours, the cry of pain of all those who suffer and implore an end to the violence, and to entrust the future of our human family to the Queen of Peace," Francis said in a statement.

He also called for an end to the violence.

Consecration is an act of surrender in which the pope recognizes both Russians and Ukrainians as children of god, and entrusts them to Mary’s care, Father Alexandre Mello, the secretary of the Vatican’s Dicastery for the Laity, Family, and Life, told Crux.

Mello also said consecration aims to build bridges as the prayer's goal is to have a healing effect and remind Russians and Ukrainians of their shared roots and identities as children of the same God.

The ceremony is tied to the Marian apparitions in Fatima, Portugal in 1917, in which many Catholics believe the Virgin Mary appeared to three children, asking that the pope consecrate Russia to her immaculate heart.

The Act of Consecration to the Immaculate Heart of Mary will be prayed during the Lenten penitential service in St. Peter's Basilica in Rome which begins at 5 p.m. local time. The pope will start the prayer at around 6:30 p.m. local time and has asked all Catholic Bishops and priests to join him spiritually.

U.S. bishops, including Cardinal Wilton Gregory, the archbishop of Washington, D.C., and Cardinal Blase Cupich, the archbishop of Chicago, announced they will be holding consecration ceremonies on Friday.

Pope Emeritus Benedict XVI said he will join in the prayer from his converted monastery in Vatican City, where he has lived since he resigned.

-ABC News' Phoebe Natanson

U.S. President Joe Biden will meet with Polish President Andrzej Duda as well as refugees from Ukraine in Warsaw on Saturday, according to White House national security adviser Jake Sullivan.

Speaking to reporters aboard Air Force One en route to Poland on Friday, Sullivan noted that Biden will also deliver a "major address" before departing Saturday.

"He will give a major address tomorrow that will speak to the stakes of this moment, the urgency of the challenge that lies ahead, what the conflict in Ukraine means for the world, and why it is so important that the free world sustain unity and resolve in the face of Russian aggression," Sullivan said. "He'll also talk about the context and history of this conflict and where he sees it going from here."

Upon arrival in Rzeszow, Poland, on Friday, Biden will meet with humanitarian aid groups as well as service members of the U.S. Army's 82nd Airborne Division, according to Sullivan.

"He will be able to talk through with a range of different humanitarian leaders and experts, both from the region and from the international community as well as the US government experts who are playing a key role in this, on how the efforts are going so far and what further steps need to be taken to make sure that we're investing those dollars as wisely as possible," Sullivan said. "He will also have the chance to visit with troops from the 82nd Airborne Division, who have been deployed to Poland to reassure our NATO ally and to deter further aggression on the eastern flank. And he will also get a briefing from the commanders of those units who will have the chance to lay out for him the various tasks and missions that the American troops stationed at the airfield here have been undertaking and continue to undertake."

-ABC News' Molly Nagle

Video has emerged showing Ukrainian rescuers working to remove unexploded devices from civilian homes amid the Russian invasion.

The video, released Friday by the State Emergency Service of Ukraine and verified by ABC News, shows pyrotechnic units in the northern city of Chernihiv using special equipment to carefully search for and remove shells, missiles and mines that landed in houses but didn't explode.

The State Emergency Service of Ukraine said it was called in to seize ammunition 18 times over the past day. The agency warned people not to approach the objects because they could explode "at any time" and to immediately report such findings to rescuers or police.

-ABC News' Victoria Beaule

U.S. President Joe Biden departed Belgium on Friday morning and was en route to Poland for the final leg of his four-day trip aimed at maintaining unity among allies and supporting Ukraine's defense against Russia.

Biden was seen boarding Air Force One in the European Union's de facto capital, Brussels, at 6:42 a.m. ET. He is expected to land in Rzeszow, Poland, at around 9:15 a.m. ET, where he will receive a briefing on the humanitarian response to the millions of people fleeing Ukraine in the wake of Russia's invasion. He will also meet with service members from the U.S. Army's 82nd Airborne Division.

-ABC News' Molly Nagle