Warnings over marathon hoax images

It was an image shared thousands of times on social media soon after the Boston Marathon explosions – that of a blonde, bespectacled girl running along a street and wearing a red T-shirt, runner’s gear and a bib.

The image, in some versions, is accompanied by this message: “See this little girl? She died today. She was running the marathon for the Sandy hook (sic) kids. She’s 8. Repost for respect of her. Wear red tommmarow (sic) to support her and all the others who died.”