KIEV, September 08. /ITAR-TASS/. The Ukrainian experts have failed to establish the exact causes of mass death of people in Odessa on May 2, the Ukrainian Rada said on its website, citing an investigative commission of the Ukrainian parliament for an investigation into mass death of citizens in the building of the Trade Unions in Odessa, in Mariupol and other cities of the Donetsk and Luhansk regions.

"In the absence of modern equipment local experts were unable to establish objective reasons of the people's death," the investigative commission said in its account available on the website.

"Only with the assistance of international experts it will be possible to find out if there were hazardous substances in the bodies of the victims who died in the building of the Trade Unions in Odessa," the commission said.

The commission reported that 48 forensic examinations of the bodies killed in Kulikovo field square had been carried out. All in all, 85 forensic examinations and 160 other tests were appointed, the commission said.

The results of the forensic tests showed that nine people died of poisoning by toxic fire fumes, thirteen were poisoned by hazardous substances which caught fire, twelve died of heavy burns of the respiratory system and body burns and eight were killed, falling from an altitude of eight meters. Six died of fatal gunshot wounds, the commission said.

On September 4 Chairman of the commission of the Odessa regional council Grigory Yepur said that the commission had disbanded itself. The investigation has been conducted by the Prosecutor's General and the Interior Ministry of Ukraine which are not accountable to deputies of a local level, Yepur said.

Representative of the Russian Interior Ministry for problems of human rights, democracy and supremacy of law Konstantin Dolgov said "the disbandment of the commission for an investigation into the Odessa tragedy fits in with Kiev's plans to entangle the investigation. The international community shall exercise mounting pressure on law enforcement bodies of Ukraine to ensure that they conduct a comprehensive and non-biased investigation into the Odessa tragedy. All those responsible must be severely punished," Dolgov said.

On May 2 the militants of Pravy Sector and the so-called self-defense forces of Kiev "Maidan" crashed a tent compound on Kuikovo Pole square, where federalization supporters had been collecting signatures in support of a referendum. Then, the militants set fire to the building of the Trade Unions, where representatives of the opposition to Maidan found shelter. Forty-eight were killed in the clashes and more than 200 were wounded.