No matter what the physical cause of the injury is, it's trivial to create false attribution with it. It happened first in Cuba, so Cuba got a lot of blame. Now it's happening in China. Did China come up with the same brilliant idea? Buy it from Cuba? Or did they both just end up with shoddy surveillance equipment?

If I had to guess, it's probably the latter. No matter the cause, though, if you knew how to do it you could pull off the attack in [insert questionable country here] and create suspicion for that country. It would be a really fast and effective way to create diplomatic tension for a third party who stands to gain from the breakdown of communication.