Ukrainian forces claim to have stopped Russia’s advance into the northern Sumy region, stabilizing the front line near the border

Following his meeting with Ukrainian President Volodymyr Zelenskyy at the NATO Summit, President Donald Trump didn't rule out sending Ukraine monetary and defense aid.

President Donald Trump said that he had a “very nice” meeting with Ukrainian President Volodymyr Zelenskyy at the NATO summit.

Ukrainian President Volodymyr Zelenskyy is expected to formally approve plans to establish a new international court to prosecute senior Russian officials for the full-scale invasion of Ukraine

Last week, Ukrainian drone hunters searching through the debris of Russia's nightly assault on their cities found a drone that was different to the rest

Officials say Russian drones and missiles have killed at least 14 civilians in Ukraine, with nine deaths reported in the capital, Kyiv

At least seven people were killed and 28 injured in Kyiv overnight as Russian drone and missile attacks again rocked Ukraine's capital, Mayor Vitali Klitschko said.

Ukrainian officials said direct hits were reported in six locations, with falling debris was reported in 25 locations.

Authorities say Russian drones have slammed into two Ukrainian cities, killing at least one person in nighttime attacks

Russia announced on Thursday that it is returning to Ukraine five children who have been separated from their families by the war.

Ukrainian President Volodymyr Zelenskyy is urging greater international pressure on Moscow following a deadly Russian missile strike that hit a Kyiv apartment building this week, killing 23 people

For European drone manufacturers, being able to say that their equipment has been tried in war by Ukrainian forces is becoming a sales pitch

President Donald Trump -- clearly frustrated by the failure of his diplomatic efforts to date -- has raised the prospect of entirely abandoning American engagement.

Massive overnight Russian strikes on Kyiv killed 15 people, Ukrainian officials said, as Moscow launched hundreds of drones and missiles at targets across the country.

A massive overnight Russian strike on Kyiv, the Ukrainian capital, killed 15 people and wounded at least 177 others, Ukrainian officials said.

An overnight Russian strike on Kyiv killed 14 people and wounded more than 100 others, local officials in the Ukrainian capital said early Tuesday.

Ukrainian President Volodymyr Zelenskyy is visiting Austria in his first trip to the European Union member country since Russia's full-scale invasion of his country in 2022

Russian President Vladimir Putin and U.S. President Donald Trump have held a lengthy phone call to discuss the escalating situation in the Middle East and Ukraine peace talks

Ukrainian officials say Ukraine has repatriated another 1,200 bodies in line with an agreement reached during peace talks in Istanbul between Russian and Ukrainian delegations

Sen. Mitch McConnell pressed Defense Secretary Pete Hegseth on "who is the aggressor" in the Russia-Ukraine war.

ABC News’ Maggie Rulli reports on the Russian drone strikes and bombs, which killed at least three people in the northeastern Ukrainian city of Kharkiv overnight, regional officials there said.

Martha Raddatz speaks one-on-one with Pres. Zelenskyy, who reveals how Ukraine's brazen drone attack was executed.

Kyiv and Odesa were among the cities struck overnight into Tuesday morning amid another night of intense airstrikes.

ABC News’ Maggie Rulli reports on the latest strikes, which happened after Russia and Ukraine exchanged prisoners.

The Ukrainian president says he was informed the U.S. would divert key defensive weapons from Ukraine to the Middle East.

Ukraine releases new video showing the moment one of its drones dove into a military complex inside Russia.

The exchanged included wounded soldiers and those ages 25 and younger, according to Ukrainian President Volodymyr Zelenskyy.

A record number of drone and missile strikes were launched across Ukraine by Russia. Ukraine says the large majority of the strikes were shot down or intercepted. 

At least 10 Ukrainian drones were shot down on their approach to Moscow overnight into Sunday morning, according to the city's mayor.

ABC News’ Chief Global Affairs Correspondent Martha Raddatz reports on a new American-run rehabilitation center in Kyiv.

ABC News’ Martha Raddatz interviews Ukrainian President Volodymyr Zelenskyy on “This Week.”

Stunning new images of Russian planes in flames after a Ukrainian drone attack.  

Ben Jensen of the Center for Strategic and International Studies joins ABC News Live to discuss the ongoing war in Ukraine following a night of deadly Russian strikes.

At least seven people were killed and 41 others were injured in massive Russian strikes across Ukraine overnight, which targeted civilian and energy infrastructure.

Volodymyr Zelenskyy said the Russian truck drivers who transported what would become platforms for Ukraine's drone attack on Russian warplanes did so unwittingly.

Martha Raddatz speaks one-on-one with Pres. Zelenskyy, who reveals how Ukraine's brazen drone attack was executed.

Ukrainian President Volodymyr Zelenskyy refuted President Donald Trump's characterization of the war between Russia and Ukraine.

In an exclusive interview with ABC News’ Martha Raddatz, Ukrainian President Volodymyr Zelenskyy responds to President Donald Trump comparing Russia and Ukraine to “two young people fighting.”

In an exclusive interview with ABC News’ Martha Raddatz, Ukrainian President Volodymyr Zelenskyy reveals new details about the surprise drone attack on Russian military targets.

At least 11 Russian aircraft were destroyed, according to an analysis by experts.

Former Deputy Assistant Secretary of Defense for the Middle East Mick Mulroy discusses the latest assault by the Russian military on Ukraine.

Air defense has been activated in Kyiv amid reports of airstrikes targeting Chernihiv, a city in northern Ukraine, ABC News confirmed.

More than 400 drones and 40 missiles were launched from Russia, leaving several dead and many more injured.

The escalation of attacks between Ukraine and Russia comes as U.S.-brokered peace talks between the countries have failed to come to fruition.

The Russian barrage in Ukraine's second largest city targeted residential high-rises and destroyed a government building.

The aftermath of a Ukrainian drone strike on Russian airspaces is shown in satellite imagery.

President Donald Trump said Russian President Vladimir Putin told him in a phone call on Wednesday that Putin will retaliate against Ukraine for its coordinated drone attack on Russian war planes.

Trump spoke on the phone with Putin for more than an hour saying it was "not a conversation that will lead to immediate peace."

Trump said he and Putin discussed Ukraine's large-scale drone operation that targeted Russian military airfields on Sunday and "various other attacks."

President Donald Trump said he spoke to Russian President Putin on Wednesday, describing their call as "good" but "not a conversation that will lead to immediate Peace."