Poland scrambled fighter jets in its airspace and closed two airports Wednesday morning as Russia carried out a combined missile and drone attack across most of Ukraine.

Ukraine said it had successfully struck targets in Russia using U.S.-supplied ATACMS missiles, ending a months-long absence of the powerful weapon from the battlefield. In a statement shared on Facebook, the General Staff of the Armed Forces of Ukraine called it "an iconic event that emphasizes Ukraine's unwavering devotion to its sovereignty."

Ukraine has not previously stated openly that it uses the advanced U.S.-provided ballistic missile systems on targets inside Russia.

Germany boosts military recruitment with free driving licenses and €2,600 monthly pay amid Russia threat and Trump's defense spending pressure on Europe.

Elsewhere, the president of Finland warned that a ceasefire in Ukraine is unlikely before the spring and urged European allies to keep up support.

Ukrainian President Volodymyr Zelenskyy plans to visit Turkey this week to revive talks on ending Russia's invasion, which began nearly four years ago.

A full-scale invasion of Poland, in the manner Russia invaded Ukraine, is rather not viable, given Russia's current military capacities, Poland's military build-up and the collective defense guarantees of NATO membership, Michnik said, "however, this reality must not diminish Poland’s ongoing preparation."

With Europe imposing sanctions on Moscow, there has been a growing network of vessels sailing without a valid flag from Russia through European waters.