BRUSSELS, March 12 (Xinhuanet) -- A test conducted by Dutch doctors in the past months have found "unusual substances" in the blood sample taken from Former Yugoslav President Slobodan Milosevic, Dutch public television NOS reported on Sunday, citing unidentified sources.

    NOS said that doctors had been trying to determine why drugs Milosevic was receiving for high blood pressure and a heart condition did not work.

    In his blood they found traces of drugs often used by patients being treated for leprosy or tuberculosis, NOS reported.

    Those drugs had neutralizing effect on the medicine Milosevic was given against high blood pressure and heart problems, it said.

    "This suggests that Milosevic did not die of natural courses," it added.

    Milosevic said he feared being poisoned just one day before his death, his legal advisor Zdenko Tomanovic said on Sunday.

    However, Del Ponte, the chief prosecutor of the International Criminal Tribunal for the former Yugoslavia, dismissed as "rumors" allegations that Milosevic had been poisoned while in UN custody.

    But she said suicide could not be ruled out until the results of an autopsy had been made available. Earlier, the tribunal said there had been no outward signs of suicide or unnatural death when his body was found on Saturday.

    Dutch pathologists and Serbian experts dispatched by the Serbian government are carrying out an autopsy to determine the cause of death. Del Ponte said she expected initial results of the autopsy later on Sunday or Monday, but added that the findings of toxicology tests might take longer.

    Milosevic, 64, was found dead Saturday in his cell at the UN detention unit in Scheveningen near The Hague. He suffered a hearttrouble and high blood pressure that had repeatedly interrupted his trial in The Hague.

    In a trial that started on Feb. 12, 2002, Milosevic faced 66 charges of war crimes, including genocide for his role in the Balkan wars following the breakup of the Yugoslav federation in the 1990s. Enditem