If it were one rocket, it could be due to some kind of component failure that caused the rocket to go off course.
Two rockets are not likely to both fail, so that suggests Poland was targeted on purpose.
Alternatively, NATO could say that they can shoot down any Russian missiles since Russia cannot be trusted and has bad aim.
I'd expect this to become a reason to send more direct aid, but not troops.
If it were one rocket, it could be due to some kind of component failure that caused the rocket to go off course.
Two rockets are not likely to both fail, so that suggests Poland was targeted on purpose.