LYON, France: Interpol has distributed a computer-generated image of the suspected suicide bomber who killed six people in an attack in Bulgaria last month.

The global policing body said Thursday it had issued a Black Notice -- used to seek information on unidentified corpses -- to its 190 member countries urging them to make the image public in the hopes of identifying the suspect.

Lyon-based Interpol also published the image, which shows a young man with fair skin, light-coloured eyes, a high forehead and short dark brown hair, on its website.

"Bulgaria's decision to request all Interpol member countries to publish this computer-generated image... demonstrates that they continue to do all they can to identify the person responsible for carrying out this murderous attack," Interpol Secretary General Ronald Noble said.

The July 18 attack at Burgas airport killed five Israeli tourists and a Bulgarian driver and injured around 30 people. Israel blamed Iran and its Lebanese ally Hezbollah, but Tehran denied any involvement.

Investigators have been struggling to identify the suspected bomber. They found only his head and limbs after the attack, suggesting the bomb had probably been attached to his torso.

They were unable to match fingerprints or DNA samples taken from the bomber with anything in international databases.