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

The Polish foreign minister said he could not guarantee that Russian President Vladimir Putin's plane would not be forced to land.

WARSAW (Reuters) -Polish Prime Minister Donald Tusk said on Tuesday Polish services detained eight people in various parts of the country in recent days, suspected of preparing acts of sabotage. "The case is ongoing. Further operational activities are continuing," wrote Tusk on X without providing further details.

A major road connecting the three Baltic states to Poland has opened, at a time of rising tensions between Europe and Russia.

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

Russia appears to have been deterred by NATO's firm response last month to incursions into Polish and Estonian airspace, but Moscow is expected to continue testing boundaries, the U.S. general serving as NATO's top commander said on Tuesday.

Poland detained three individuals in a joint operation with NATO ally Romania on suspicion of collaborating with Russia’s secret services.

In Poland and Romania, Ukrainians working for Russian intelligence services were detained for planning to smuggle explosives into Ukraine. The plan was for the explosion to occur during transportation,

LONDON (Reuters) -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.

Dozens of protesters gathered in Rzeszow, Poland, demanding the government stop deepening its involvement in the Ukraine war. Demonstrators accused foreign powers of dragging Poland into a dangerous conflict that could “destroy” the nation.