Two doctors accused of performing illegal organ transplants in Kosovo have been detained and seven other people are being questioned, police said Wednesday.

The police launched an investigation after a Turkish citizen, who said he had come to Pristina to donate a kidney, was stopped at the airport on his way home Tuesday.

Police searched a private clinic, a two-storey house in the suburbs of the capital, and found drugs and blood in plastic bags.

"We have identified an Israeli citizen who is believed to have received the kidney from the Turkish citizen," said Veton Elshani of the Kosovo police.

In a separate probe, Serbia's war crimes court is investigating allegations of trafficking of human organs taken from Kosovo Serbs during the 1999 conflict in Kosovo between Serbian forces and ethnic Albanian guerrillas.