Prosecutors accused a former KGB agent Tuesday of murder in the radioactive poisoning of fellow ex-operative Alexander Litvinenko and sought his extradition from Russia.

In 2006, Alexander Litvinenko had tea with two Russian men at the Millennium Hotel, pictured here, in London. Three weeks later, he died of radioactive poisoning. Matt Dunham ...

A statement from the ECHR said: “The court found in particular that there was a strong prima facie case that, in poisoning Mr Litvinenko, Mr Lugovoi and Mr Kovtun had been acting as agents of the ...

Litvinenko, 43, died Nov. 23 in London, three weeks after he became ill following a meeting at a sushi restaurant. Doctors found the rare radioactive substance polonium-210 in his body.

The U.S. government's negligent curiosity about radiation poisoning was an overcorrection to its previous negligent ignorance about the subject. Robert Oppenheimer and Gen. Leslie Groves, who ran ...