Key equipment remained intact and there were no immediate nuclear safety or security concerns as the result of intense shelling over the weekend at Ukraine’s Zaporizhzhia nuclear power station, the International Atomic Energy Agency said.

The agency’s director-general Rafael Grossi said four nuclear safety, security and safeguards experts staying at the site conducted an extensive visit to the six-unit station, the largest in Europe, to assess first-hand the physical impact of shelling that occurred on Saturday evening and again on Sunday morning, in one of the most serious such incidents at the facility in recent months.

Grossi said the status of the six reactor units is stable and the integrity of the spent fuel, the fresh fuel and the low, medium and high-level radioactive waste in their respective storage facilities was confirmed.