LYON (AFP) - The Greek authorities have asked Interpol to help identify a little blonde girl found last week in a Roma camp in Greece, the cross-border police agency said Tuesday.

The effort is based on the girl's photo and DNA profile, which have been communicated to all Interpol member countries, the organisation based in the French city of Lyon said.

The information was contained in a so-called yellow notice which is circulated by Interpol to help locate missing persons, especially minors, or, as in this case, identify people who cannot identify themselves, it said.

"Until now, a comparison of the girl's profile against Interpol's global DNA database has not produced a match," the organisation said in a statement.

"All of the organisation's 190 member countries are now being encouraged to check her DNA profile against their own national databases," it added.

It recalled that the Greek authorities were investigating whether the girl may have been abducted or been a victim of child traffickers.

The girl, known as Maria, was found by police last week in a Roma camp near the town of Farsala in central Greece.

Initially thought to be four years old, but later confirmed from dental checks to be five or six, she was kept by a Roma couple who were placed in pre-trial detention on Monday for allegedly abducting her.

The couple, a 39-year-old man and his 40-year-old wife, deny the charge and claim that she was voluntarily handed over by her Bulgarian Roma mother who could not care for her.

"At the request of the Greek authorities, Interpol has also issued blue notices for Christos Salis and Eleftheria Dimopoulou, the couple in whose home the girl was found," the organisation said.

"Blue notices are issued to collect additional information about a person's identity, location or activities," it said.