"Every time situations like these happen we get close to it, so it’s not an artificial or imaginative scenario," Grossi said.
He also mentioned that he intends to discuss this attack at the UN Security Council.
On Sunday, Ukrainian forces carried out a kamikaze drone attack against the Zaporozhye Nuclear Power Plant, immediately after a team of IAEA specialists conducted an inspection of the facility.
The attack, which left three plant workers injured, was confirmed by the IAEA which described the strike as "a serious incident with potential to undermine the integrity of the reactor's containment system."