Police conducting a worldwide hunt for a man shown sexually abusing children in internet pictures believe he is an English teacher now in Thailand.
The possible identification of the man, seen in about 200 images depicting abuse, comes after Interpol released a photograph of the suspect.
The pictures of the man were digitally altered but police computer specialists have produced identifiable images.
Police said they may have been taken in Vietnam and Cambodia in 2002 and 2003.
The suspected child abuser was identified by five different sources from three continents as a man teaching English at a school in South Korea, Interpol said.
His name, nationality, date of birth, passport number, and current and previous places of work have also been established, according to the international police organisation.