LONDON, July 19 (Reuters) - U.S. Secretary of State Condoleezza Rice urged Russia on Thursday to honour Britain's request to extradite a suspect in the murder of Alexander Litvinenko, but also said Moscow should not be isolated.

"A terrible crime was committed on British soil and Britain has to find the perpetrators and bring them to justice and Russia should honour the extradition request," Rice told Sky News in Lisbon ahead of a meeting of the Quartet of Middle East negotiators.

Rice added that there was "nothing to be gained" by isolating Russia, a member of the Quartet, but also said that Russia should not use its vast energy resources as a political tool.

AlertNet news is provided by