From "The Analyst":

RUSSIAN AGENTS DAMAGE WESTERN DEFENCE SITES

Over the past few months at least five western defence manufacturers have been targeted by Russian sabotage. In Czechia (ammo production), in Bulgaria (152mm ammo production), in Spain (electronic components). In the UK in the last month the new BAE artillery shell factory in South Wales and this past week the IRIS-T missile factory outside Berlin.
Almost nothing is being said about these attacks. NATO put out a statement but domestic governments are loathe to point the finger at the source of these attacks - Russian sleeper agents in the west.
These have long been known to exist and post-soviet era many of them have carried on laying low with nothing to do but live out their lives.
Other Russian sympathisers have also likely been recruited.
These attacks have happened. Someone is doing them and the internal security services of these nations need to be finding them. Let’s hope they’re stepping up their efforts.
Timid governments unwilling to speak up about the reality, cowering under the prospect of escalation, need to inform their populations and make it clear this isn’t acceptable. Making the public aware that the war in Ukraine can reach you makes them more invested in the reason the aid must flow.