...Of course there's not enough information. This whole forum is about speculation! But whatever it is, it's worthy of attenton because it's going to be something quite unexpected and unusual.
Animal attacks would leave a huge mess with teeth marks and blood spilled everywhere. They don't extract certain organs for consumption with surgcal presicion and leave other parts intact. Any group of perverted humans who would do such a thing have managed to do it across the world, in the same style and manage to evade authorities. Also seems highly unlikely. So with the two prosaic explanations ruled out, what's left?
