Russia Opposition Politician Boris Nemtsov Shot Dead

Mr Nemtsov was shot on bridge within sight of St Basil's Cathedral and Kremlin

A leading Russian opposition politician, former Deputy Prime Minister Boris Nemtsov, has been shot dead in Moscow, Russian officials say.

An unidentified attacker in a car shot Mr Nemtsov four times in the back as he crossed a bridge in view of the Kremlin, police say.

He died hours after appealing for support for a march on Sunday in Moscow against the war in Ukraine.

Russian President Vladimir Putin has condemned the murder, the Kremlin says.

In a recent interview, Mr Nemtsov had said he feared Mr Putin would have him killed because of his opposition to the war in Ukraine.

Boris Nemtsov was one of Russia's leading economic reformers in the 1990s

Mr Nemtsov, 55, served as first deputy prime minister under President Boris Yeltsin in the 1990s.

He had earned a reputation as an economic reformer while governor of one of Russia's biggest cities, Nizhny Novgorod.

Falling out of favour with Yeltsin's successor, Mr Putin, he became an outspoken opposition politician.

'Brutal murder'
Thorbjorn Jagland, secretary general of the Council of Europe, condemned the killing, saying in a tweet: "I am shocked and appalled key opposition leader Boris Nemtsov was shot. Killers must be brought to justice."

US President Barack Obama condemned the "brutal murder" and called on the Russian government to conduct a "prompt, impartial and transparent investigation".

Mr Nemtsov was shot at around 23:40 (20:40 GMT) on Friday while crossing Bolshoy Kamenny Bridge accompanied by a woman, Russia's interior ministry said.

He was shot with a pistol from a white car which fled the scene, a police source told Russia's Interfax news agency.

According to Russian-language news website Meduza, "several people" got out of a car and shot him.

One of the politician's colleagues in his RPR-Parnassus party, Ilya Yashin, confirmed Mr Nemtsov's death.

"Unfortunately I can see the corpse of Boris Nemtsov in front of me now," he was quoted as saying by Russia's lenta.ru news website.

Flowers were left at the site of the shooting through the night.

Russian opposition leaders Ilya Yashin, left, and Ksenia Sobchak
react to news of the death of Mr Nemtsov.
I expect both are wondering if they will be next.

In his last tweet, Mr Nemtsov sent out an appeal for Russia's divided opposition to unite at an anti-war march he was planning for Sunday.

"If you support stopping Russia's war with Ukraine, if you support stopping Putin's aggression, come to the Spring March in Maryino on 1 March," he wrote.

Speaking earlier this month to Russia's Sobesednik news website, he had spoken of his fears for his own life.

"I'm afraid Putin will kill me," he said in the article (in Russian) on 10 February.

"I believe that he was the one who unleashed the war in the Ukraine," he added. "I couldn't dislike him more."

Boris Nemtsov addresses the crowd at a rally in Moscow to oppose
President Putin's policies in Ukraine - 15 March 2014

Mr Putin has been widely accused of fomenting the bloody rebellion in east Ukraine - an accusation he denies. Fighting there followed Russia's annexation of Crimea in March last year.

Almost 5,800 people have died and at least 1.25 million have fled their homes, according to the UN.

The Ukrainian government, Western leaders and Nato say there is clear evidence that Russia is helping the rebels with heavy weapons and soldiers.

Independent experts echo that accusation while Moscow denies it, insisting that any Russians serving with the rebels are "volunteers".

Crimea was just the beginning for the ambitious Putin

It's not likely we will ever know who killed, or had killed, Mr Nemtsov. We can speculate that Mr Putin has the most to gain from his death. We can speculate that Putin considered the murder of Mr Nisman in Argentina and thought to himself, "if Cristina can get away with it, so can I". We are pretty confident that his people were behind the murder of reporters critical of him. So it would seem pretty obvious who is responsible for Mr Nemtsov's murder.

On the other hand, as with the Argentinian murder, it was so Mafia-like, one would be hard-pressed to believe that it was a professional hit by highly trained secret service. Perhaps both were attempts to discredit the respective Presidents. Perhaps, but I would be very surprised.

Argentina: President Cristina Fernandez Case Dismissed

President Fernandez's second term in office ends in December

A federal judge in Argentina has dismissed a controversial case against President Cristina Fernandez de Kirchner and her foreign minister.

They had been accused of covering up alleged Iranian involvement in a bomb attack against a Jewish centre in 1994.

Judge Daniel Rafecas has concluded that there was not enough evidence to pursue the charges.

The accusation came from special prosecutor Alberto Nisman, who was found dead last month in his flat.

Judge Rafecas said he was throwing out the case after carefully examining Mr Nisman's 350-page report.

There was no proof that an agreement signed by the Argentine government with Iran in January 2013 was an attempt to shield the involvement of senior Iranian officials in the attack, the judge said.

'No legal basis'
The agreement was rejected by the Iranian government two months later and was never approved by Iran's parliament.

Defence Minister Agustin Rossi welcomed Judge Rafecas' ruling saying: "We have always said that Nisman's claims had no legal basis."

Mr Nisman was found dead just hours
before he was due to give evidence
to a congressional committee

The case against Ms Fernandez and foreign minister Hector Timerman is now closed.

But the BBC's Wyre Davies says the judicial system in Argentina is highly politicised and the decision to cease investigations will further polarise a dangerously divided nation.

'Rogue agent'
Mr Nisman was due to testify in Congress against Ms Fernandez and Mr Timerman the day after his body was found.

The circumstances of his death have not been clarified.

President Fernandez said Mr Nisman been fed misleading information by a rogue intelligence agent. The government has rejected any role in his death.

Thousands of people marched through the streets of Buenos Aires
last week to demand justice for Mr Nisman

The lower house of the Argentine Congress has meanwhile approved a bill scrapping the country's secret agency, the Intelligence Secretariat.

The proposal was first announced days after Ms Nisman's death, on 18 January.

A new federal investigative agency, which will be accountable to Congress, will replace it.

Ms Fernandez said the change was overdue because the agency had remained largely untouched since the end of military rule in 1983.

The opposition called the proposal a smokescreen for its involvement in the scandal.