VLADIMIR Putin has been accused of killing a top Russian scientist as he dies just two days after being jailed for alleged treason. Dr Dmitry Kolker, 54, was in hospital with pancreatic cancer when he was whisked away by the FSB and locked up in one of Russia’s most notorious jails on suspicion of spying. East2WestRussian scientist Dmitry Kolker, 54, with his daughter Alina Mironova[/caption] East2WestDmitry Kolker, 54, was in hospital with terminal pancreatic cancer[/caption] Dr Kolker’s family have accused Putin’s security services of ‘torture’Getty He was one of two leading academics accused of being in a Chinese spy ring by the FSB – the top government body once headed up by Putin. Dr Kolker’s family branded the treatment of the top scientist by Putin’s security services as “torture” after he was dragged from his death bed. They had warned that Dr Kolker was too ill with cancer to even have any more chemotherapy or treatment. After being flown four hours to Moscow, he was jailed at Lefortovo prison before being rushed to hospital where he died early on Saturday. Read more Russia news MAD VLAD Putin allies demand 'SEVERE' response after accusing Ukraine of missile strike ENEMY WITHIN Mystery of 'world's best spy' who helped Putin's rise & fed Russia CIA secrets His son, Maxim Kolker, 22, said: “The FSB killed my father, knowing his condition.” “They didn’t even let our family say goodbye.” He blamed the spy case investigator – named as Morozov – along with the judge who approved his dad’s detention and “the entire state machinery”. “I hope you will answer for your actions,” Maxim said. Most read in News SHARK CARNAGE SECOND tourist dies in shark attack at resort hours after woman, 68, killed SHARK HORROR Final words of snorkeller, 68, killed by shark as beaches CLOSED along Red Sea 'ON YOUR SIDE' We're about to put more pay back in your pocket, say Boris and Rishi SNATCH ALERT Urgent warning after 'man in blue van tried to snatch girl, 12, near school' PREDATOR IN PALACE Andrew & Ghislaine were 'intimate' & she had 'run of Buckingham Palace' BLOODBATH Tourist, 68, dies after having arm & leg ripped off by SHARK in Red Sea resort “It took you two days to kill a man. And now me and my family are without a father.” His heartbroken sister Alina Mironova, 29, said: “This is a great tragedy for our family. “It should not have happened like this.” The FSB claimed it had medical authorisation to unplug Dr Kolker from his hospital drip and lock him up. But a source said paranoid Putin is “seeing spies everywhere”. They said: “Top scientists were officially urged to collaborate with top foreign partners, they did so, and now they are being accused of espionage.” Dr Kolker was head of Novosibirsk State University’s quantum optical technologies laboratory. He was regarded as a world expert on lasers and previously worked with the Rutherford Appleton Laboratory in Oxford. Read More on The Sun CHEERS TO THAT I'm size 16 & found the perfect bottomless brunch outfit from Tesco THAT'S RUFF My nightmare neighbour yells every time I walk dog - I'm scared to leave house It’s not clear whether the alleged “treason” accusation was related to advanced military secrets concerning new-age weapons. Professor Anatoly Maslov, 75, a pioneer of hypersonic technologies, was also arrested and remains in the Lefortovo prison in Moscow.