Global Courant
Ukraine says Russia has planted “objects resembling explosives” on the roofs of two reactors at the Zaporizhia nuclear power plant.
Russia has made counter-claims that Ukraine is planning to attack the plant.
The BBC’s analysis editor Ros Atkins looks at what we know about the allegations and what they tell us about the risk of an incident at Europe’s largest nuclear power station.
Produced by Michael Cox and Floyd Cush