A well-known journalist at Russia's leading news radio station has been stabbed in the throat by an attacker who burst into her studio - the latest in a string of assaults on journalists or opposition activists in Moscow.

The Ukrainian woman with Kremlin critic Boris Nemtsov when he was gunned down told Russia media yesterday that she did not see his killer, as conflicting reports emerged about the availability of surveillance footage showing the slaying.

The freed members of the Pussy Riot punk band said yesterday they still wanted Russian president Vladimir Putin out of power and would like ex-tycoon Mikhail Khodorkovsky to replace him.