Polish Foreign Minister Radoslaw Sikorski warned on Tuesday Europe must be prepared for Russia to strike deep into the region, calling it "irresponsible" not to build defences such as a "drone wall" on its eastern flank.

"We can’t simply wait and assume that a potential Russian attack won't come before 2029," German intelligence chief Martin Jaeger said. "We’re already under fire today."

The European Union's top official warns that Russia is conducting a "targeted gray zone campaign" against Europe.

The victory of a pro-European party in Moldova’s parliamentary elections was a litmus test in the former Soviet nation where Russian interference and disinformation campaigns have spent millions in a bid to prevent the country from joining the European mainstream.

Peaceful European NATO nations that support Ukraine are repeatedly being targeted by mysterious drone incursions, and experts say dozens in the past month appear to have links to Russia.

Danish Prime Minister Mette Frederiksen is warning that Europe is in a hybrid war with Russia and must arm itself.

President Vladimir V. Putin lashed out at “European elites” for “whipping up the hysteria” about the “Russian threat.”