The International Atomic Energy Agency IAEA has inspectors on site at the Zaporizhzhya nuclear power plant.
These have not seen any visible signs that mines or explosive charges have been deployed, says IAEA chief Rafael Grossi in a statement.
At the same time, he says that the IAEA has requested further access to be able to establish that nothing of this sort has been placed on the buildings.
The news agency AP has seen newly taken high-resolution satellite images that show no change on the roofs of the buildings.