Months after the Kremlin’s most prominent critic, Alexei Navalny, was poisoned, the Russian doctor who allowed him to be treated after he fell ill has been reported as missing.

Dr Alexander Murakhovsky, since appointed health minister of the Siberian region of Omsk, did not return from a hunting trip on Friday, state news agency Tass reported on Sunday, citing a police spokesman.

A local authority had earlier spoken of the disappearance of a man born in 1971, without giving a name. According to the report, additional police officers were requested for the search.

Until a few months ago, Dr Murakhovsky ran the Omsk clinic where Navalny, now jailed in a prison camp, was taken after he collapsed on a domestic flight last August.