Russia has given Ukrainian forces in the besieged city of Mariupol until Monday at 4 a.m. local time to surrender, according to reports.

Gen. Col. Mikhail Mizintsev, a senior Russian commander, warned the city’s local authorities, including the mayor, that if they do not surrender they will face a “military tribunal,” according to Russian state media.

He called on the official authorities in Kyiv to “see reason” and to cancel orders given earlier that he said oblige Ukrainian fighters “to sacrifice themselves and to become the ’martyrs of Mariupol.’”

Russian forces have been trying to push deep into Mariupol, engaging in street-to-street fighting while indiscriminately bombarding the city. Ukrainian troops defending the city are believed to be under severe pressure right now.

Mizintsev said Russia has proposed opening humanitarian corridors beginning at 9 a.m. Monday to allow Ukrainian troops and civilians to leave Mariupol.

He claims Russia’s goals in the city are “purely humanitarian” and repeated Russia’s false claims that it was Ukrainian “nationalist” forces that have destroyed several major civilian buildings, which in reality have been struck directly by Russian air and missile strikes.

“We call on the units of the Ukrainian armed forces, the battalions of the Territorial Defense, foreign mercenaries, to cease military action, lay down their arms and to leave for the territories controlled by Kyiv via the humanitarian corridors agreed with the Ukrainian side,” Mizintsev reportedly said. “Moreover, the safe exit of all those laying down their arms is guaranteed and the sparing of their lives.”

Ukrainian President Volodymyr Zelenskyy addressed members of the Knesset, the legislature of Israel, on Sunday, criticizing the country for not doing more to help Ukraine.

During the address, Zelenskyy drew parallels between Ukraine and Israel's challenges with their neighbors and questioned why Israel has not sent arms to Ukraine or imposed sanctions on Russia.

"Everyone in Israel knows that your missile defense is the best," Zelenskyy said. "It is powerful. Everyone knows that your weapon is strong. Everyone knows you're doing great. You know how to defend your state interests, the interests of your people. And you can definitely help us protect our lives, the lives of Ukrainians, the lives of Ukrainian Jews. One can keep asking why we can't get weapons from you. Or why Israel has not imposed strong sanctions against Russia."

Zelenskyy described the Russian invasion as "a large-scale and treacherous war aimed at destroying our people," quoting former Israeli Prime Minister Golda Meir, who was born in Kyiv.

"We intend to remain alive. Our neighbors want to see us dead," Zelenskyy said. "This is not a question that leaves much room for compromise."

During Zelensky's speech, the Knesset's cyber unit and the National Cyber Directorate fought off a number of cyberattacks aimed at interrupting the live-streamed speech, the Jerusalem Post reported, citing the Knesset.

-ABC News' Christine Theodorou

Russian military units are completing an overthrow of Ukraine’s nationalist Donbas Battalion, Russian Defense Ministry spokesman Igor Konashenkov told reporters at a briefing on Sunday.

The units advanced by 12 kilometers over the past day to reach the Nikolske line and blocked the populated area of Solodke from three sides, Konashenkov claimed.

Almost 1,500 Ukrainian tanks and other armored vehicles have been destroyed since the start of the military operation, Konashenkov alleged.

In addition, 150 Ukrainian multiple rocket launcher systems, 584 field artillery weapons and mortars, and 1,279 pieces of special military mortar equipment have been liquidated, he said.

The Russian Aerospace Forces also destroyed 89 Ukrainian military objects, as well as seven drones, over the past 24 hours, Konashenkov claimed.

About 10 million Ukrainians have been displaced within the country or have sought refuge in other countries since the invasion began last month, the United Nations High Commissioner for Refugees reported on Sunday.

Between Feb. 24 and March 19, 3,389,044 refugees left Ukraine, according to the agency, meaning there are more than 6 million internally displaced in Ukraine.

-ABC News' Christine Theodorou

All Russian troops have left the Ukrainian cities of Kyiv and Chernihiv, withdrawing north toward the borders of Belarus and Russia to consolidate before likely redeploying to the Donbas region in eastern Ukraine, a senior U.S. defense official told reporters Wednesday.

But even with the Russians gone, the territory remains treacherous.

"There are some indications that they left behind mines and things like that, so the Ukrainians are being somewhat careful in some areas north of Kyiv as they begin to clear the ground and clear the territory and re-occupy it," the official said.

While the U.S. hasn't yet seen these troops redeploy elsewhere in Ukraine, it'll likely happen soon, according to the official. Ukrainian forces are preparing for a major fight in Donbas, the official said.

The official also said the Pentagon is "monitoring" an apparent nitric acid explosion in Ukraine's Luhansk region, which Russia blamed on Ukraine.

"We've seen the Russians claim that this was a Ukrainian attack on this. We do not believe that is true," the official said. "We do believe that the Russians are responsible, but exactly what they used when they did it, why they did it, what the damage is, we just don't have that level of detail," the official said.

The official also noted that a small number of Ukrainians currently in the U.S. for "professional military education" were pulled aside for a couple days of training on Switchblade drones, which the U.S. is sending overseas as part of its military aid, according to the official.

"Although it's not a very difficult system to operate, we took advantage of having them in the country to give them some rudimentary training on that," the official said.

-ABC News' Matt Seyler