¡¡ATHENS, Aug. 19 (Xinhuanet) -- Latest Toxicology test made by Greek coroners have ruled out that people on the crashed Cypriot plane were knocked out by carbon monoxide.

    The Boeing 737 of Cyprus' Helios Airways, which took off from the Larnaca International Airport, dived into an uninhabited mountain 25 km north of Athens last Sunday, killing all 121 peopleaboard.

    Coroner Filippos Koutsaftis, head of a team of Athens coroners,said Friday that the tests on six bodies found very low levels (7 percent) of lethal emission, levels that could possibly be tracedin cigarette smoking.

    He also said they were still doing tests for other gases, poisons, drugs and clcohol.

    The findings deepened the mystery as to what made unconscious of the crew and passengers that led to a long-time auto piloting and the final crash.

    Meanwhile, a Greek army search team found parts of a voice recorder, which recorded the conversation between the pilot and co-pilot. During the initial search, the investigators only found the cover and some parts of the voice recorder.

    The voice recorder will be sent to Paris for decoding. The other black box- the flight data recorder- had been sent there.

    Information gleaned from the data recorder apparently showed that an alarm arose at 9:15 a.m. shortly after the plane's take-off. Initial reports said a cooling problem with the plane's on-board computer system triggered the alarm. Enditem