KYIV. June 1 (Interfax) - A second examination has confirmed the presence of dioxin in Ukrainian President Viktor Yushchenko's blood, the Ukrainian Prosecutor General's Office said on Thursday.

The commission consisting of Ukrainian, U.S., German and Japanese experts confirmed the results obtained at laboratories in the United States, Germany, the United Kingdom and Belgium.

"The expert's results lead us to believe that Yushchenko was poisoned," the Ukrainian Prosecutor General's Office said.

The information on the time, place and method of poisoning are being kept secret and the data will not be disclosed before the investigation is over, a statement by the Ukrainian Prosecutor General's Office says.

It was earlier reported that Yushchenko's health problems began in September 2004, when he was a candidate for the Ukrainian presidency.

Yushchenko met with heads of the Ukrainian Security Service at the country house of Volodymyr Satsyuk, the former deputy chief of the Ukrainian National Security Service, on September 5, 2004. After the meeting Yushchenko was hospitalized at the Rudolfinerhaus hospital in Vienna on September 10.

Doctors said that Yushchenko had been poisoned with dioxin five days before the hospitalization.