据美国官员称，俄罗斯军队继续试图从多个方向推进乌克兰，而由总统弗拉基米尔·泽伦斯基(Volodymyr Zelenskyy)领导的乌克兰人正在进行“顽强的抵抗”。

袭击始于2月24日，当时俄罗斯总统弗拉基米尔·普京宣布了一项“特别军事行动”乌克兰首都基辅以及哈尔科夫和马里乌波尔等其他主要城市继续遭受猛烈的炮击和导弹袭击，其中许多袭击是针对民用建筑的

美国取消弹道导弹试验以避免与俄罗斯关系升级

美国空军部周五表示，美国洲际弹道导弹测试最初于3月初推迟，以避免俄罗斯的“误解”，最近被取消。

在俄罗斯将其核威慑力量投入使用后，国防部长劳埃德·奥斯丁最初推迟了LGM-30G民兵III导弹的例行试飞高度戒备状态。

空军在一份声明中表示，“在俄罗斯入侵乌克兰期间，由于过度谨慎以避免误解或误解，发射曾被推迟，并因同样的原因被取消。”“我们计划的下一次试飞是在今年晚些时候。国防部对美国战略力量的准备状态充满信心。”

基辅郊区布加勒斯特从俄罗斯军队中解放出来，市长说

乌克兰首都基辅郊区的布查市市长宣布，该市已从俄罗斯军队手中解放出来。

“3月31日将作为我们的武装力量从俄罗斯占领者手中解放出来的一天，载入我们定居点和整个领土社区的历史，”市长Anatolii Fedoruk周五在脸书发布的一段视频中说。“今天，我宣布这是令人高兴的一天，这是我们武装部队在基辅地区的一次伟大胜利。”

上周，乌克兰国防部表示，正在向基辅挺进的俄罗斯军队已经部分占领了包括布加勒斯特在内的几个西北郊区。

周五，超过6200人从乌克兰东南部撤离

据乌克兰官员称，周五，超过6200人通过公共汽车和私家车从乌克兰东南部地区撤离。

官员称，在顿涅茨克地区，3071人从被围困的港口城市马里乌波尔撤离。

菲利普·达纳/美联社

一名警察正在检查一个来自马里乌波尔难民中心的家庭的文件

周五早些时候，马里乌波尔官员表示，尽管乌克兰官员一再努力疏散平民，但估计仍有10万平民被困在该市。

此外，乌克兰官员表示，超过1700人从卢甘斯克地区疏散，超过1400人从扎波日日亚地区疏散。

乌克兰和俄罗斯就拟议中的安全保证条约举行会谈

乌克兰首席谈判代表Mykhailo Podolyak告诉美国广播公司新闻，俄罗斯和乌克兰谈判代表几乎在周五继续和平谈判。

波多利亚克说:“摆在桌面上的是乌克兰代表团提出的关键文件——安全保障条约。”这项拟议的协议提供了退出战争和防止未来冲突的可能性。

乌克兰提出了一个新的安全保障体系类似于北约的集体防御条款，该条款在法律上要求“保证国”提供武器，并在乌克兰上空设立“禁飞区”，以防受到攻击。

Podolyak说，双方正在研究合同基本条款的法律措辞。

“讨论极其困难，因为各方的谈判立场受到所有接触线上军事局势每日变化的强烈影响，”波多利亚克说。

Russia-Ukraine live updates: US cancels ballistic missile test to avoid escalation

Russian forces are continuing their attempted push through Ukraine from multiple directions, while Ukrainians, led by President Volodymyr Zelenskyy, are putting up "stiff resistance," according to U.S. officials.

The attack began Feb. 24, when Russian President Vladimir Putin announced a "special military operation." Heavy shelling and missile attacks, many on civilian buildings, continue in Ukraine's capital, Kyiv, as well as other major cities like Kharkiv and Mariupol

US cancels ballistic missile test to avoid escalation with Russia

A U.S. intercontinental ballistic missile test that was initially postponed in early March to avoid "misinterpretation" by Russia was recently canceled, the Department of the Air Force said Friday.

Defense Secretary Lloyd Austin originally delayed the routine test flight of an LGM-30G Minuteman III missile after Russia put its nuclear deterrent forces on astate of heightened alert.

"The launch had been previously delayed due to an overabundance of caution to avoid misinterpretation or miscommunication during the ongoing Russian invasion of Ukraine and was cancelled for the same reason," the Air Force said in a statement. "Our next planned test flight is later this year. The Department is confident in the readiness of the strategic forces of the United States."

Kyiv suburb Bucha liberated from Russian forces, mayor says

Bucha, a suburb of the Ukrainian capital of Kyiv, has been liberated from Russian forces, its mayor declared.

"March 31 will go down in the history of our settlement and the entire territorial community as a day of liberation from the Russian occupiers by our armed forces,” Mayor Anatolii Fedoruk said in a video posted to Facebook Friday. "Today I state that this day is joyful and it is a great victory of our armed forces in Kyiv region."

Last week, Ukraine's Defense Ministry said Russian forces battling toward Kyiv were able to partially take several northwestern suburbs, including Bucha.

Over 6,200 evacuated from southeastern Ukraine Friday

Over 6,200 people were evacuated from regions in southeastern Ukraine Friday by buses and private cars, according to Ukrainian officials.

In the Donetsk region, 3,071 people were evacuated from the besieged port city of Mariupol, officials said.

Earlier Friday, Mariupol officials said an estimated 100,000 civilians remained trapped in the city despite repeated efforts by Ukrainian officials to evacuate them.

Additionally, over 1,700 people were evacuated from the Luhansk region, and over 1,400 from the Zaporizhzhia region, Ukrainian officials said.

Ukraine, Russia hold talks on proposed security guarantee treaty

Russian and Ukrainian negotiators continued peace talks virtually on Friday, Mykhailo Podolyak, a chief negotiator for the Ukrainians, told ABC News.

"On the table is the key document proposed by the Ukrainian delegation - the Treaty on Security Guarantees," Podolyak said. This proposed agreement provides for the possibility of exit from the war and the prevention of future conflicts.

Ukraineproposed a new system of security guaranteessimilar to NATO's collective defense clause which would legally require "guarantor countries" to provide arms and impose a "no-fly" zone over Ukraine, in the event of an attack.

Both sides are working on the legal wording of the basic provisions of the contract, Podolyak said.

"The discussion is extremely difficult, since the negotiating positions of the parties are strongly influenced by the daily change in the military situation on all lines of contact," Podolyak said.