Alexei Navalny/YouTube
A woman known as Nastya Rybka on a yacht with oligarch Oleg Deripaska in a video that was banned from Instagram.
Instagram has found itself dragged into a scandal about bribery, corruption and prostitution at the highest echelons of Russian society after banning an online exposé by a leading anti-Putin politician.
The social network yanked a 25-minute "investigation" fronted by Alexei Navalny and his Progress Party after a Russian court ruled in favour of the oligarch in the video, and ordered it to be removed.
YouTube, which also hosted the video, has taken a different approach, and has yet to remove the footage from the internet.
The video itself is a lengthy dissection by Navalny of evidence which he claims is proof of bribery between rich businessmen and senior policymakers in Moscow, improbably brought to light by a Russian escort with a penchant for sharing her glamorous escapades.
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