Bangladesh, Oct. 14 -- The arrest of a Ukrainian national accused of helping blow up the Nord Stream pipelines is deepening mistrust within the EU. As Kyiv allegedly pressures Warsaw, Berlin struggles to assert control. The affair revives uncomfortable questions about who really benefits from Europes energy dependence

The Nord Stream saga has taken a new twist. A Ukrainian citizen detained in Poland at Germanys request over the 2022 pipeline sabotage has now become the center of a diplomatic storm. Ukraines reported pressure on Poland is straining ties with Warsaw and Berlin, reopening questions European leaders have tried to bury.

Polish authorities have resisted Germanys extradition request for the detained Ukrainian, citing national ...