In this Feb 29, 2020, file photo, Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow, Russia. (PAVEL GOLOVKIN / AP)

MOSCOW - A Russian judge has been asked to jail opposition leader Alexei Navalny in absentia for having allegedly broken the terms of a suspended sentence he had been serving and for other infractions, court documents showed on Tuesday.

Navalny was airlifted to Germany for treatment in August after collapsing on a plane in what Germany and other Western nations say was an attempt to murder him with a Novichok nerve agent.

Russia’s Federal Prison Service last month ordered opposition leader Alexei Navalny to immediately fly back from Germany, where he is convalescing, and report at a Moscow office or be jailed if he failed to return in time

Russia’s Federal Prison Service (FSIN) last month ordered him to immediately fly back from Germany, where he is convalescing, and report at a Moscow office or be jailed if he failed to return in time.

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It accused him of flouting a suspended sentence he had been serving over a conviction dating from 2014, and of evading the supervision of Russia’s criminal inspection authority. Navalny said the original conviction was politically-motivated.

On Tuesday, a court database showed authorities had requested that the suspended sentence be canceled, raising the prospect of a custodial sentence instead.

Navalny’s spokeswoman Kira Yarmysh accused Russian authorities of trying to scare him into not returning to Russia, something he has said he intends to do ahead of parliamentary elections due in September next year.

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Russia has said it has seen no evidence he was poisoned and has denied trying to harm him. The Kremlin has said Navalny is free to return to Russia at any time like any other Russian citizen.