"Now that it has been officially announced that Medvedev has been informed about the crux of the problem, I don't consider it necessary to insist on the form of discussion" within the government, Khodorkovsky said.

"The aim of my appeal has been achieved. I have ended my hunger strike," he said on his legal team's website.

Medvedev 'familiar'

Natalya Timakova, spokeswoman for Medvedev, said he was "familiar" with Khodorkovsky's May 17 open letter to the head of the supreme court.

Khodorkovsky, 46, is already serving an eight-year sentence for tax evasion and fraud in a case that he claimed was politically motivated by his opposition to then-president Vladimir Putin.

In depth

 The life and trials of Khodorkovsky
 Ex-oil tycoon's hunger strike

Once Russia's richest man, Khodorkovsky could get 22 more years if convicted for oil theft.

He is due for release next year.

The May 14 decision by Moscow's Khamovniki district court to extend Khodorkovsky’s detention prompted his hunger strike, according to the letter.

The court ruling ignored recent changes in Russia's criminal procedural code, he said.

His aim was to "reduce opportunities for arbitrariness and corruption", the statement said.

Khodorkovsky has said he hopes Medvedev will follow through on promises to tackle corruption in the legal system and ease restrictions on the opposition.

However, critics say little has changed since he replaced Putin in 2008.

Death in prison

Medvedev signed a law banning the pre-trial detention of suspects accused of economic crimes after the death in prison of a tax lawyer awaiting trial drew international condemnation.

Khodorkovsky, the former head of Yukos, the Russian energy company, has been in prison since 2003 and has previously staged several brief hunger strikes.

His supporters have repeatedly staged protests outside the court hearings.

They have said that the case is politically motivated - part of a state crackdown on opponents of Putin, now Russia's prime minister.

The Russian government insists Khodorkovsky committed massive financial crimes to acquire his fortune.