? unverified
We have no doubt that Russian intelligence services are behind this act of sabotage. And it's worth adding that Russian intelligence services are increasingly using people connected to the criminal world.
Unverified: the evidence Polish police described (recordings, fingerprints, DNA) places the two suspects at the site, but none of it, as published, ties them to Russian intelligence. A trial in Poland would test it; extradition from Germany was pending.
ukraine russia war/nato relations/hybrid attacks on allies·source ↗