Moscow: Changing the Russian Constitution to extradite Litvinenko murder suspect Andrei Lugovoi is "absolutely unrealistic", Russia`s Foreign Minister said on Monday after talks with his British counterpart.
"Our position has not changed," Sergei Lavrov told reporters after his meeting with Britain`s David Miliband.
"I believe our British colleagues understand that demands to change our Constitution are absolutely unrealistic."
British police accuse Lugovoi of murdering former Russian spy turned exiled Kremlin critic Alexander Litvinenko by lacing his tea with radioactive polonium in a London hotel on November 2, 2006.
Russian authorities have insisted their Constitution does not allow them to extradite Lugovoi, who was later elected to the Parliament for a nationalist party.