The move follows last month’s explosion on a railway line roughly 90 km southeast of Warsaw, which Polish authorities attribute to a separate Moscow-backed cell. In 2023, a 16-member network was convicted for surveillance, sabotage and subversion plots, including a failed attempt to derail a train carrying aid to Ukraine. ABW said the latest suspects were identified in the course of the ongoing investigation into that previously exposed group, underscoring what officials describe as a widening Russian covert campaign targeting Poland.