I am writing an event that creates a tile blocker on a planet (which represents a tile on which all life has been wiped clean by an attack). I want the effect to kill any existing population on the tile in question. Is this done automatically? If not, is there a way to do this? I don't want the pop to move to another tile. The kill_pop seems to apply to the planet as a whole and is unconditional. Or can it be scoped to a tile?