Just to add to this, Interpol’s Secretary General, Jürgen Stock, warned of this early on in the war [1]:
“We can expect an influx of weapons in Europe and beyond. We should be alarmed and we have to expect these weapons to be trafficked not only to neighbouring countries but to other continents.”
[1]: https://www.theguardian.com/world/2022/jun/02/ukraine-weapon...