Ukrainian President Volodymyr Zelenskyy warned allies that the defense of his nation is a litmus test for broader Western resolve.

Ukrainian officials say Russia has launched a major ballistic and cruise missile attack on regions across Ukraine.

NATO member Poland scrambled fighter jets after overnight Russian missile and drone attacks on Ukraine, Warsaw's military said on Wednesday. Newsweek has reached out to Polish authorities and Russia's Defense Ministry for comment via email.

Ukraine fired six US-made ATACMS ballistic missiles, six British Storm Shadow cruise missiles and at least 146 drones into Russia in a mass attack, says Moscow. It threatened retaliation against the air strikes.

Ukraine used six British Storm Shadow missiles and US-made Atacms tactical ballistic missiles in what Kyiv described as its “largest attack” on Russian military facilities.

An air-raid warning has been issued across Ukraine on the morning of 15 January due to the threat of missile strikes. Source: map of air-raid warnings; Ukraine's Air Force; monitoring Telegram channels Details: An air-raid warning was issued in all Ukrainian oblasts due to the threat of a missile strike.

The barrage appeared to be one of the largest recent assaults in Ukraine’s campaign to damage Russia’s war machine on its home territory.

A major Russian attack on Ukraine is currently underway. The Operational Command of the Armed Forces has announced that standby pairs of fighter jets have been scrambled, and ground air defence and radar systems have reached the highest state of readiness.