Authorities have detained a Ukrainian citizen in Poland and two others in Romania for allegedly working with Russian intelligence on a sabotage campaign.

For more than a decade, Poland has been building up for the worst case scenario: becoming the front line in a war between Russia and the West.

Faced with an increasingly aggressive Russia and mixed messages from the US, Warsaw is ramping up its defensive capabilities

Russia is using cryptocurrencies to pay saboteurs carrying out hybrid attacks across the European Union, according to a Polish security official.

The road known as Via Baltica will pass through a narrow strip of land between Belarus and Russia ’s Kaliningrad exclave, called the Suwalki Gap.

A Polish court handed down prison sentences to three Ukrainians on Friday for their roles in a string of huge fires in Poland and the Baltic states, as Warsaw aims to crack down on what it says is a wave of sabotage orchestrated by Russia.

Poland has launched an investigation into Russian intelligence activities after several suspects attempted to send parcels containing explosive and incendiary materials to Ukraine. Details: The National Public Prosecutor's Office has opened an investigation into Russian intelligence operations targeting Poland.

Two suspects were also arrested in Romania for allegedly depositing incendiary devices at an international courier company in Bucharest.

Lithuanian Prime Minister Inga Ruginiene said on Thursday that her Polish counterpart Donald Tusk has agreed to postpone a reopening of crossings on Poland's border with Belarus.

Polish and allied air forces were activated as Russia struck targets in Ukraine, prompting temporary closures of Radom and Lublin airports.