The widow of poisoned spy Alexander Litvinenko, Marina, is "utterly dismayed by the coroner's decision to abandon his search for the truth about Russian state responsibility for her husband's death", her solicitor has said.
Alexander Litvinenko died in November 2006 after his tea was poisoned with a radioactive poison, allegedly during a meeting with two Russians - former KGB contacts Andrei Lugovoy and Dmitry Kovtun, in central London.
Prosecutors named Lugovoy as the main suspect in the case but Russia has refused to extradite him to the UK for questioning.
The pre-inquest hearing heard details of Mr Litvinenko's work with MI6. He had been working with the agency for a "number of years" and was working with the Spanish secret service investigating the Russian mafia.
Litvinenko was paid by both British and Spanish secret services, into a joint bank account he shared with his wife, the court heard.
He had been due to travel to Spain with Mr Lugovoy shortly before his death to provide intelligence in an investigation into the Russian mafia's links to the Kremlin and Russian President Vladimir Putin, according to Ben Emmerson QC speaking at the pre-inquest hearing.
The inquest into the death of poisoned spy Alexander Litvinenko could be scrapped and replaced with a public inquiry to allow evidence to be heard in secret.
Coroner Sir Robert Owen published a ruling today which revealed that he cannot hear evidence on the preventability of Mr Litvinenko's death or linked to the alleged involvement of the Russian state in public.
Evidence cannot be heard in secret as part of an inquest but could be as part of a public inquiry.
Sir Robert said: "It is my present view that I should hear submissions as to whether I should invite the Secretary of State (the Home Secretary) on behalf of Government to consider whether the power to hold an inquiry should be exercised in this case."
He said that the issues of preventability and Russian involvement are of "central importance" to the investigation into Mr Litvinenko's death.
A friend of the former Russian spy Alexander Litvinenko and his widow Marina said the coroner's decision was "deeply dismaying", and that it was "upsetting" that Britain had prioritised relations with Russia over the need to hold an open inquest:
– Alex Goldfarb
It appears the British government is more concerned about the use of chemical weapons in Syria than radioactive weapons being used on the streets of London.
On the other hand, it's an admission by the British government that the Russian state is culpable because otherwise they would not have requested immunity.
That in itself is a partial victory for Marina.
Evidence that is alleged to expose the ties between MI6 and poisoned spy Alexander Litvinenko will be examined in secret, a coroner ruled.
The former KGB agent's family believe the files may contain the key to his November 2006 assassination in London.
Mr Litvinenko, 43, was poisoned with polonium-210 while drinking tea at the Millennium Hotel in London's Grosvenor Square.
His widow Marina said she was disappointed by the decision and claimed the government planned to "suppress" evidence to protect relations with Russia.
Russia has denied that it was involved in the murder of Kremlin critic and former spy Alexander Litvinenko in London in 2006.
A British lawyer told a preliminary hearing into Litvinenko's poisoning that the Russian government was most likely involved in his death, which has soured relations between Moscow and London.
But Russian Foreign Ministry spokesman Alexander Lukashevich told reporters: "We hope that as a result of the (legal process)... all the baseless allegations about some kind of a Russian involvement in this affair will be dispelled once and for all."
A court in London today heard how the Russian state was responsible for the murder of Alexander Litvinenko, the spy who died after his tea was poisoned with a radioactive chemical in 2006.
Sejal Karia reports on today's sensational pre-inquest hearing.
The wife of former Russian spy Alexander Litvinenko said the inquest into her husband's death should consider whether MI6 failed in its duty to protect against a "real and immediate risk to life."
Mr Litvinenko had been hired by MI6 for a number of years and was working with the Spanish secret service investigating the Russian mafia shortly before his death, a pre-inquest review at Camden Town Hall, in London, heard.
Mrs Litvinenko said outside the hearing she was pleased the alleged involvement of the Russian government in her husband's murder would now be considered.
"We've been saying this many times but this is the first time this question has been raised in court."
"I appreciate all that was done today and I'm looking forward to any decision which will be taken by the coroner after today's hearing."
Former spy Alexander Litvinenko was paid by both British and Spanish secret services, a pre-inquest review into his death heard today.
The 43-year-old spy, who died of polonium-210 poisoning in 2006, received wages from both agencies from both states into a joint bank account he held with his wife, the hearing was told.