International Atomic Energy Agency experts at Ukraine’s Zaporizhzhia nuclear power station said powerful explosions have been occurring outside the facility, indicating military activities in the vicinity of the site on the frontline of the conflict in the country.

The IAEA said that almost daily in recent days and weeks, its nuclear safety and security team at the six-unit facility in southeast Ukraine has been reporting such events to headquarters in Vienna.

Some blasts apparently take place some distance away from Europe’s largest nuclear power station, while others seem much closer to the facility itself.