The Latest: US looking closely at UK report on Litvinenko

LONDON (AP) — The latest developments in the lengthy British public inquiry into the 2006 poisoning death of former Russian spy Alexander Litvinenko.

The White House isn't ruling out future punitive action against Russia after a British judge concluded that Russian President Vladimir Putin probably approved a plan to kill a former FSB security service agent who had become a Kremlin critic.

The British government summoned Yakovenko to the Foreign Office Thursday to express "deep concern" at the inquiry's finding that Russia's FSB security service likely ordered the killing, probably with the knowledge of President Vladimir Putin.

The Foreign Office called the findings "deeply disturbing, demonstrating a flagrant disregard for U.K. law, international law and standards of conduct, and the safety of U.K. citizens."

Home Secretary Theresa May, who is in charge of justice issues, also told lawmakers that the government is summoning the Russian ambassador to the Foreign Office to express its "profound displeasure."

Russia's Foreign Ministry says Moscow does not consider the conclusions of a British inquiry into the 2006 poisoning death of a former Russian spy to be impartial because it claims the result had been predetermined.

Andrei Lugovoi, now a member of the Russian parliament, tells the Interfax news agency on Thursday "the results of the investigation that were announced today once again confirm London's anti-Russian position and the blinkered view and unwillingness of the British to establish the true cause of Litvinenko's death."

The widow of poisoned former Russian spy Alexander Litvinenko is relieved with the verdict of a British public inquiry into his death and is urging the British government to take steps against Russian agents operating inside Britain.

A British judge says Russian President Vladimir Putin probably approved a plan by Russia's FSB security service to kill former agent Alexander Litvin