Russian jets violated NATO airspace over Lithuania for 18 seconds during suspected refueling exercise. Nation's president calls it a breach of international law amid tensions.

Lithuania accuses Belarus and Russia of a "deliberate escalation of hybrid warfare" as balloons shut down major airport.

Russia believes some NATO members, in particular Poland, want to abandon restrictions on the deployment of nuclear weapons in their countries, which would aggravate “strategic risks” and tensions, Russian foreign ministry spokeswoman Maria Zakharova said.