The International Atomic Energy Agency has failed to reach a deal with Russia's state-run nuclear firm Rosatom over ways to ensure the safety of a Russia-controlled nuclear power plant in Ukraine.

IAEA Director General Rafael Grossi met the head of Rosatom in Moscow on Thursday.

Grossi said on Twitter that the talks were "necessary" and that he would continue his efforts to set up a security zone around the Zaporizhzhia plant in southern Ukraine.

Rosatom issued a statement saying the talks will continue.

The Chief of the General Staff of Russian Armed Forces, Valery Gerasimov, reiterated his country's intention to maintain control of the plant.

He said that the plant's safety can only be ensured with the activities of the Russian military.

The Zaporizhzhia plant is one of the largest nuclear power stations in Europe. Russia seized control of it in the early stages of the invasion of Ukraine.

Workers have had to restore external power to the plant every time shelling cut the supply needed to cool reactors.

Russia and Ukraine have accused each other of the shelling.