Investigators in the case are looking into whether Ryan Routh had grievances related to former President Donald Trump's position on Ukraine.

Russian President Vladimir Putin has ordered the country’s military to increase its number of troops by 180,000 to a total of 1.5 million, as Moscow’s military action in Ukraine drags on for more than 2 ½ years

Russia’s Defense Ministry said Sunday it defeated a fresh wave of Ukrainian drone attacks over the west of the country.

Ukrainian officials are asking the U.S. and other allies to allow them to use these weapons despite Russian President Vladimir Putin warning against it.

The head of NATO’s military committee says that Ukraine has the solid legal and military right to strike deep inside Russia to gain combat advantage, reflecting the beliefs of a number of U.S. allies

Ukraine has made a new call on the West to allow it to strike deeper into Russia after a meeting between U.S. and British leaders produced no visible shift in their policy

Dozens of Russian drones were launched overnight in an attack targeting regions throughout Ukraine, President Volodymyr Zelenskyy said.

President Joe Biden and the United Kingdom's Prime Minister Keir Starmer are in talks in Washington on the matter.

U.S. historian and author Timothy Snyder has led a charity run in Kyiv to raise awareness of the conditions under which Ukrainian prisoners of war are held in Russia as the conflict approaches a third winter

Biden and Starmer meet at the White House to discuss possibly allowing Ukraine the use of European-made long-range missiles to strike certain targets deep inside Russia

Russian President Vladimir Putin issued a strong warning against Ukraine using Western missiles, saying it would mean NATO and the United States are at war with Russia.

Secretary of State Antony Blinken has traveled to Kyiv to pledge support amid debate over giving Ukrainian forces permission to conduct strikes within Russia’s borders using American weapons.

Secretary of State Antony Blinken arrived in Kyiv as Ukrainian leaders pressed for U.S. permission to use American-made long-range weapons against targets inside Russia.

The United States and Britain have pledged nearly $1.5 billion in additional aid to Ukraine during a visit to Kyiv by their top diplomats

Secretary of State Antony Blinken met with Ukrainian leaders as Ukraine pressed for U.S. permission to use long-range weapons against targets inside Russia.

Videos posted by pro-Russian military bloggers and geolocated by ABC News showed a large Russian armored column attacking toward the village of Snagost.

Ukraine’s prime minister has warned that the country could be facing its toughest winter since the full-scale Russian invasion began, as airstrikes against the country’s beleaguered energy infrastructure intensify

Russia’s Defense Ministry said it downed 144 Ukrainian drones during a major overnight attack in multiple regions of the west of the country, including the Moscow area.

The Russian Defense Ministry said Tuesday it downed 144 Ukrainian drones during a major overnight attack over nine regions in the west of the country, including the Moscow area.

Two NATO members say that Russian drones have violated their airspace

The United States has informed allies that it believes Iran has transferred short-range ballistic missiles to Russia for its war in Ukraine

The heads of the British and American foreign intelligence agencies say Ukraine’s surprise incursion into Russia is a significant achievement that could change the narrative of the grinding war

Funeral services have been held in the eastern Ukrainian city of Poltava for the victims of one of the deadliest Russian airstrikes since the invasion began, which killed over 50 people at a military training facility

Russian missiles struck Lviv, killing at least seven people and injuring dozens of others, officials say, amid a major shake-up in Ukraine’s government.

Ukraine's president has told U.S. and allied military leaders meeting in Germany that his country needs the ability to strike deep within Russia now

A volatile phase of the war has seen fighting for the first time move onto Russian territory but also allowed Russia to more rapidly advance in eastern Ukraine.

Andrii Sybiha replaced the outgoing Dmytro Kuleba, who held the post since 2020.

Ukrainian lawmakers confirmed Andrii Sybiha as the country’s new foreign minister on Thursday amid a major government reshuffle.

Ukrainian and Russian authorities reported dueling drone attacks overnight on Wednesday as an intense and bloody week of long-range strikes continued.

Foreign Minister Dmytro Kuleba, one of Ukraine’s most recognizable faces on the international stage, has submitted his resignation ahead of an expected reshuffling of government leaders

At least seven people were killed after drones and missiles struck Lviv, a day after one of the deadliest strikes since the start of the war that killed more than 50 people at a training facility and hospital in Poltava.

Russian missiles struck Lviv in western Ukraine on Wednesday, killing at least five people and injuring dozens of others, Ukrainian President Volodymyr Zelenskyy said.

Ukrainian Foreign Minister Dmytro Kuleba is the latest minister to tender a resignation amid a major shake-up of top officials under President Volodymyr Zelenskyy.

Russian missiles and drones again crisscrossed Ukrainian skies on Monday night as Moscow’s strike campaign killed more than 50 people.

Ukrainian officials say two ballistic missiles struck a military academy and a nearby hospital, killing dozens and wounding more than 200, in one of the deadliest attacks in the war.

Dozens are dead and more are still missing after two ballistic missiles hit the Poltava Military Communications Institute, officials said.

Russian missiles struck the Ukrainian capital of Kyiv early on Monday, injuring at least two people, the city’s administration said.

A group of Ukrainian lawmakers have appealed to their Mongolian counterparts to execute the ICC arrest warrant issued against President Vladimir Putin.

The White House is expected to keep in place restrictions on Ukraine’s use of long-range weapons deep inside Russia despite pressure from a visiting delegation from Kyiv.

Pilot Oleksii Mes was part of a U.S.-run program to train Ukrainian pilots to fly the fighter jets. A U.S. official says the jet doesn't appear to have been brought down by enemy fire.

Ukraine scored victories on and off the battlefield last week, with Kyiv securing a long sought after visit by Indian Prime Minister Narendra Modi.

Multiple people were killed and injured in a second night of missile and drone attacks on infrastructure targets across the country from Lviv to Kharkiv.

At least 15 regions throughout Ukraine had been struck in the early morning attack, Kira Rudick, a member of Ukrainian Parliament, said on Monday.

The massive attack targeted power and water plants, killing at least seven people, as Ukrainian President Volodymyr Zelenskyy pleaded for allies to allow Ukraine to use western weapons inside Russia.

Ukrainian President Vladimir Zelenskyy says Russia fired around 100 drones and more than 100 missiles, mainly targeting Ukraine’s already damaged power and water plants.

Plus, Hamas announces that it's sending a delegation to Egypt ahead of high-level cease-fire talks.

As the war reaches a 30-month milestone, both Ukraine and Russia agree to a prisoner swap.

A massive fire in Russia after an attack on a ferry by Ukraine resulted in multiple explosions and the sinking of the ferry. Russian officials are installing concrete bunkers for protection.

ABC News’ Ian Pannell reports as Ukraine launches more drone attacks on military sites and fuel depots in Russia.

A large fire was burning at a Russian military airfield early on Thursday after it was targeted by drones overnight.