Russia wants detailed information about the tests that German doctors have carried out on Russian opposition leader Alexei Navalny.

He is in a coma in a German hospital after he became unwell on a flight from Siberia to Moscow on August 20. He is suspected of having been poisoned.

According to the Russian newspaper RBC, Russian justice has asked the German Ministry of Justice for information about the treatment of Navalny. Russian prosecutors said last month that they saw no reason for a criminal investigation.

Navalny was taken from a hospital in Omsk to the Berlin Charité hospital last month.

Doctors in the German clinic have stated that the opposition leader may have been poisoned with a substance from the group of cholinesterase inhibitors.

This substance can also be found in nerve agents such as sarin, VX and Novichok.

The latter was used in the poisoning of the former Russian spy Sergei Skripal and his daughter Julia in March 2018 in Great Britain. They just survived that.