Meanwhile, a power line supplying the nuclear plant has been reconnected after shelling resulted in a cut on Friday night, the head of the International Atomic Energy Agency (IAEA), Rafael Grossi, said.
"Our team at #Zaporizhzhya confirms the offsite power line lost yday was restored & #ZNPP is reconnected to the grid - a temporary relief in a still untenable situation," he tweeted on Sunday.
Mr Grossi said he would call on both sides to support a protection zone around the plant. Russia and Ukraine have blamed each other for the shelling.
Meanwhile, Russian divers are beginning a fuller examination of the damage done by Saturday's explosion on the road and rail bridge linking occupied Crimea with Russia.
Though limited traffic has resumed along one lane, a section of the bridge was brought down by the blast.
Security has been tightened and Russian President Vladimir Putin has ordered a full investigation.
