I don't know where they were manufactured.
How do you know they were manufactured in Russia? Or are you just making this claim because you think it will impress others with Russias capabilities? That's what it seems like to me at this point.
We both seem to be repeating ourselves. I think we will soon see Geran-3 kamikaze drones in action, with the same air-cooled engine (Chinese or Iranian clone of the German Limbach L550E engine for ultralight aircraft), but with a silencer and therefore not so loud. This will make the task of detecting the drone even more difficult and increase its effectiveness. We'll see.