Employees from a Ukrainian arms firm conspired with defence ministry officials to embezzle almost $40 million earmarked to buy 100,000 mortar shells for the war with Russia, Ukraine's security service has reported.
His country's future at stake, Ukrainian President Volodymyr Zelenskyy has told United States senators that with US aid his fighters can beat back the Russian invasion.
Turkey has stalled ratifying Sweden's membership in NATO, accusing the country of being too lenient toward groups that Ankara regards as security threats.
A US F-16 fighter jet shot down an armed Turkish drone in northeast Syria that was operating near US military personnel and Kurdish Syrian Democratic Forces.
The ambassador, Vadym Prystaiko, had criticised Zelenskyy over his reaction to recent remarks by British Defence Secretary Ben Wallace, who had suggested Ukraine had not expressed sufficient "gratitude" for Western financial support.
Australian Prime Minister Anthony Albanese said Russia's "illegal" and "immoral" invasion of Ukraine is a big theme of the NATO Summit as he reaffirmed Australia's support for the people of Ukraine.
NATO chief Jens Stoltenberg said on Monday that Turkey has agreed to back Sweden's bid to join the military alliance – a major development on the eve of the NATO summit.
Former Australian prime minister Paul Keating has blasted the head of Nato, calling him a "supreme fool" for looking to deepen the alliance's ties with Asia in a bid to contain China.
The US Justice Department has launched an investigation into the possible release of Pentagon documents that were posted on several social media sites and appear to detail US and NATO aid to Ukraine
The Nordic country's membership doubles Russia's border with the world's biggest security alliance and represents a major change in Europe's security landscape
The United States has released video of the moment it says a Russian fighter jet collided with a US Air Force unmanned drone, forcing it to ditch into the Black Sea.
The United States has determined Russia has committed crimes against humanity in Ukraine, Vice President Kamala Harris has announced, insisting "justice must be served" to the perpetrators.
As Russia's invasion of Ukraine grinds on and fears of conflict escalation continue, another international flashpoint has been heating up in eastern Europe.
NATO has doubled down on its commitment to one day include Ukraine, a pledge that some officials and analysts believe helped prompt Russia's invasion this year.
After Poland confirmed "Russian-made missiles" landed within its borders, the nation is now looking at triggering Article 5 of the NATO treaty. Here are the nations involved and what that could mean.
Russian President Vladimir Putin has monitored drills of the country's strategic nuclear forces involving multiple practice launches of ballistic and cruise missiles