Kate and William suffer fresh blow as all photos issued by Kensington Palace placed under review

The Princess of Wales was beaming in the picture alongside her three children Prince George, Princess Charlotte and Prince Louis.

The picture was taken by Prince William and distributed by international photo agencies around the globe.

However, just over 24 hours after the picture was released, Princess Kate issued an official apology for editing the photograph.

The Princess of Wales's apology came after four major international photo agencies "killed" the picture.

CNN has said they "regard it as unacceptable to move, change or manipulate the pixels of an image".

The US Broadcaster has confirmed they are reviewing all photos issued by Kensington Palace following the clear editing of Kate's Mother's Day photo.

They said: "CNN is now reviewing all handout photos previously provided by Kensington Palace."

A decision regarding any potential action will be taken when the investigation has concluded.

On Monday, the Princess of Wales took to social media to apologise for the confusion her editing had caused.

Kate wrote: "Like many amateur photographers, I do occasionally experiment with editing.

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"I wanted to express my apologies for any confusion the family photograph we shared yesterday caused.

"I hope everyone celebrating had a very happy Mother’s Day. C"

Kensington Palace has confirmed that the original unedited version of Kate's picture will not be published.

Princess Kate is not expected to return to royal duties until after Easter as she continues to recover from abdominal surgery.