Actionscript 3 :: Can't Remove All Images Of A Sprite-container?

I've got a stack of images.Those images are all added to a sprite container:

var container:Sprite = new Sprite();
container.addChild(img);//added in a loop
addChild(container);

Later, when I iterate through the container to remove the images I say:

for(var i:int=0;i<container.numChildren;i++)
{
var currImg:Sprite = container.getChildAt(i) as Sprite;[code].....

Only a part of the images are removed. If I trace container.numChildren I get the correct number of images to be removed.