Dutch security services expelled four Russians over a cyber attack plot targeting the global chemical weapons watchdog, officials said.
The operation by Russia’s GRU military intelligence allegedly targeted the Organisation for the Prevention of Chemical Weapons in The Hague in April.
The OPCW has been probing the chemical attack on a Russian ex-spy in the UK.
The allegations are part of an organised push-back against alleged Russian cyber attacks around the world.
The Netherlands has summoned the Russian ambassador for an explanation, reports said.