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. Last Updated: 07/27/2016

Marina Litvinenko Writes Putin

The widow of former security services agent Alexander Litvinenko has written a letter to President Vladimir Putin with a plea to solve the killing.

In the letter, Marina Litvinenko warns that if Putin does not help British authorities find the killers, she will assume he must "have something to hide."

Litvinenko adds: "I ask that you instruct your officials to assist in bringing the murderers to justice."

Excerpts of the letter were published in Britain's Daily Mail on Sunday.

Kremlin spokesman Dmitry Peskov said Monday that the president had not yet received the letter.

Peskov said Putin gets weekly updates on news reports from around the globe and probably knows of the letter. "But," he added, "I can't say for sure."

Russian prosecutors, meanwhile, hope to travel to London as soon as possible to interview tycoon Boris Berezovsky and Chechen rebel envoy Akhmad Zakayev, among others. As of Monday, there had been no announcements indicating Britain's Home Office had granted permission to prosecutors.

A British newspaper, The Observer, reported Sunday that Home Secretary John Reid had, in fact, granted permission.

But a Home Secretary spokeswoman, who declined to give her name in keeping with office policy, said Monday that the home secretary had not decided whether to allow the Russian investigators to travel to Britain. She added, however, that he had contacted the "relevant police authorities" for consideration.

Russian prosecutors could not be reached for comment Monday.

Alexander Litvinenko died in a London hospital Nov. 23. Doctors said he had been poisoned with polonium-210.