A picture purporting to show the new identity of one of the killers of toddler James Bulger has been posted on Twitter, prompting an investigation.
The image is supposed to show Jon Venables, who was jailed along with his friend Robert Thompson for killing the youngster in a crime that appalled the nation 20 years ago this week.
In the picture, the man identified as Venables is seen smiling, apparently at a birthday party.
Venables was given a new identity after being released from prison for James' murder in 2001. There is a worldwide ban on publishing anything that would identify him as Jon Venables.
His parole was revoked and he was jailed again in 2010 for downloading and distributing dozens of indecent images of children. He is now making a new bid for release.
Denise Fergus, the mother of the murdered two-year-old, told Sky News earlier this week that Venables was a "ticking time bomb" and should not be released.
The image posted on Twitter was re-tweeted 100 times.
A spokesman for the Attorney General's Office said: "The AGO has been alerted to a possible contempt of court.
"We are liaising with the Ministry of Justice and others to establish the facts.
"We can neither confirm nor deny whether the pictures in question are of Jon Venables.
"It should be noted, there is a worldwide injunction in place which prevents the publication of any images or information purporting to identify anyone as Jon Venables."