March 24 (UPI) — An unidentified projectile struck the grounds of Iran’s Bushehr nuclear power plant on Tuesday night, according to Iran’s Atomic Energy Organization, the second time in a little more than two weeks that the facility has been threatened by the ongoing war.

The projectile struck at 9:08 p.m. local time, resulting in no casualties or damage, it said in a statement.

“Attacking peaceful nuclear facilities is not only a violation of international regulations and rights, but also seriously endangers #regional security,” Iran’s AEO said in a post tagging the United Nations nuclear watchdog, the International Atomic Energy Agency.

“It is expected that international institutions will adopt a responsible and transparent stance in response to such actions.”

The IAEA said it was informed of the incident by Iran, adding that the plant was operating normally.

The agency’s director-general, Rafael Grossi, reiterated his call “for maximum restraint to avoid nuclear safety risks during conflict,” the IAEA said in a statement.

The incident comes eight days after an unidentified projectile struck near the plant on March 17, the first reported strike near Bushehr since the war between Iran and the United States and Israel began late last month.

Located near Bushehr city on Iran’s southwest Persian Gulf coast, the Bushehr plant began construction in 1975, but its original German contractor abandoned the project following the Islamic Revolution four years later. In the mid-1990s, Russia agreed to complete Bushehr Unit 1, Iran’s first reactor, which began operating in 2011, according to the U.S. Congressional Research Service.