Ukraine
That wouldn't be good. I sure hope the Ukrainian's had the common sense to not do that.
On Edit:
Did some quick research. The story originates in a Dutch news paper HLN which is described as "sensation-oriented, popular-populist newspaper" by Wikipedia. The story is behind a pay wall so I can't evaluate it.
I translate that description to mean very likely to be pro Russian, pro Putin, pro nationalists.
And it's not Dutch weapons they say have been transferred, it's Belgian weapons.
I smell a toxic rat.