An international public appeal has been announced by Interpol to identify a man shown sexually abusing children in images posted on the internet.
The man is seen in around 200 photographs, which feature the abuse of 12 young boys. The images were taken in Vietnam and Cambodia.
Handout photo of the man wanted by Interpol for abusing children
A number of images of the man were posted on Interpol's website today.
They show a white man, with dark, unkempt, receding hair. In one of the images he is wearing glasses, while in another he is smiling. It is thought the photographs were taken in 2002 or 2003.
It is the first time Interpol has taken the step of issuing such an appeal.
Although the original photographs were digitally altered by either the man or an accomplice to disguise his face, police have been able to produce an identifiable image of him.
Despite worldwide efforts to locate the man, his identity and nationality remain unknown.