The autopsy on the body of former Russian agent Alexander Litvinenko was one of the most dangerous examinations because of the radioactive poison he had drunk, a pathologist announced on Wednesday.

Litvinenko died on November 23, 2006 after being poisoned by radioactive polonium-210 in London, and this would not have been discovered by routine analysis. Russian President Vladimir Putin allegedly ordered two people to execute the agent, Seattle Times reported.

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Nathaniel Cary, the person who conducted the autopsy, said Litvinenko's corpse was so hazardous that it remained untouched for two days after his death in a hospital in London. The officials who conducted the autopsy also had to use protective clothing, he added.

Cay pointed out that he had no knowledge about any other confirmed case of polonium poisoning in other parts of the world. A normal postmortem would not have discovered the poison and that it would have been a mystery until now had an attending doctor not conducted a urine test before Litvinenko died, the pathologist explained.

Litvinenko was a former agent of the Russian government and also a British citizen had become a critic of the Kremlin. He had fallen ill for more than 20 days after drinking green tea with two Russian men at a hotel in London. On his death bed, he wrote a letter accusing Putin of ordering his assassination.

Putin might have succeeded in killing him but his actions would not leave the Russian president in peace, Litvinenko's letter said.

The men who met with Litvinenko --- Dmitry Kovtun and Andrei Lugovoi --- are still wanted for murder and the investigation into this case is still ongoiong. Russia has denied its involvement in the case and the Russian government has refused to extradite the two suspects.

TagsRussian agent, Alexander Litvinenko, autopsy, most dangerous, radioactive