Last week, radiation detection stations in Finland and Sweden stated they've recorded a rise in cesium-134, cesium-137, cobalt-60, and ruthenium-103.
May not be directly linked with Russian nuclear plants
While the available evidence suggests the particles had come from the direction of western Russia, they might not be directly linked with Russian nuclear plants.
RIVM stated, "Some recent media reports claimed, possibly based on a mistranslation of our original report (in Dutch), that the radionuclides originated from western Russia.
Upon media speculation, a spokesperson for Rosenergoatom, part of Rosatom state nuclear energy corporation, stated "Both stations are working in normal regime.
22 /23 June 2020, RN #IMS station SEP63 #Sweden🇸🇪 detected 3isotopes; Cs-134, Cs-137 & Ru-103 associated w/Nuclear fission @ higher[ ] than usual levels (but not harmful for human health). The possible source region in the 72h preceding detection is shown in orange on the map. pic.twitter.com/ZeGsJa21TN— Lassina Zerbo (@SinaZerbo) June 26, 2020