British officials are still puzzled by the use of this poison, the radioactive isotope Polonium 210.
Mr Litvinenko died in 2006 after he was apparently poisoned with the radioactive substance polonium-210.
BBC: Alexander Litvinenko murder was 'London nuclear terror'
Prosecutor General Yuri Chaika told reporters Tuesday that it's nonsense to assume the rare polonium-210 isotope came from Russia.
Doctors have also found low levels of polonium-210 in Scaramella's system, though he said he did not feel ill.
Alexander Litvinenko, a renegade Russian security officer living in London, was killed by poisoning with polonium, a rare radioactive substance, in 2006.
Litvinenko died Nov. 23 in a London hospital after ingesting radioactive polonium-210.
Traces of polonium-210 were found at around a dozen other sites in London, including three hotels, a stadium, two planes and an office building.
That is the formula the report applies, for example, to Iran's explanation for having conducted research on polonium-210, which can be useful for triggering nuclear weapons.
On that day Litvinenko fell sick, suffering (it eventually turned out) the effects of poisoning by polonium, a rare radioactive substance that killed him three weeks later.
And Mr. Lugovoi, he gave an interview yesterday actually in Moscow, where he denied involvement again and in fact said he was a victim himself of polonium poisoning.
Russian investigators have appeared recalcitrant in the Livtinenko case, and the government has refused to extradite the polonium suspect, Andrei Lugovoi, calling it a matter of national sovereignty.
He was a friend and close associate of Alexander Litvinenko, the former Russian security agent who died in London in 2006 after drinking tea laced with radioactive polonium.
On Wednesday Russia's Investigative Committee said it had also conducted its own probe, and had ascertained that Mr. Lugovoi and a colleague, Dmitry Kovtun, were also exposed to polonium in the restaurant.
Mr Berezovsky was a close friend of murdered Russian emigre and former KGB officer Alexander Litvinenko, who died in 2006 after he was poisoned with the radioactive material polonium-210 while drinking tea at a London meeting.
"We don't have enough information to make any definitive statement, but it does seem a bit of a stretch" to conclude that Arafat was poisoned by polonium-210, he told CNN in a telephone interview last week.
"We have evidence there is too much polonium, but we also have hints from the medical records that this may not be the case, " said Francois Bochud, director of the Institut de Radiophysique in Lausanne, Switzerland.
British police say they have amassed detailed evidence against Mr. Lugovoi, a career security service officer, and tracked a trail of polonium across Europe to his London hotel room and the upscale Mayfair bar where he met with Mr. Litvenenko when he consumed some polonium-laced tea.
应用推荐