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Hundreds of supporters of murdered Russian journalist Anna Politkovskaya gathered in Moscow Wednesday to mark the third anniversary of her death and demand that her killers be brought to justice.

The demonstration in the Russian capital began with a moment of silence at 4:03 p.m. local time -- the exact moment Politkovskaya was gunned down in her apartment building.

The journalist was a critic of the Kremlin, and her death fueled international condemnation of Russia's human rights record.

In a letter to Russian President Dmitri Medvedev, rights group Amnesty International said the fact that Politkovskaya's killers remain free "reflects a failure by the Russian authorities to fully investigate such crimes."

Politkovskaya's former editor, Sergei Sokolov, says prosecutors missed a chance in April to arrest the suspected gunman, Rustam Makhmudov.  But he says new, previously unidentified suspects have emerged.

Two of Makhmudov's brothers and a former police officer are set to be tried, for a second time, for alleged involvement in the murder.

Anna Politkovskaya wrote extensively about human rights abuses in Chechnya and was critical of then-President Vladimir Putin and his Chechnya policy.  A gunman shot and killed her at her Moscow apartment building in October 2006.




Some information for this report was provided by AP.