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Apple has apologised for a "deeply offensive" iPhone application called Baby Shaker, which made a game of quieting crying babies by shaking them.

It removed the $0.99 (£0.59) game from its iTunes Store on Wednesday, two days after it went on sale.

It sparked outrage from children's groups and brain injury foundations.

The aim of the game was to quiet babies by shaking the iPhone until a pair of thick red Xs appeared over each eye of a baby drawn in black-and-white.