"We are increasingly alarmed by reports of new missile strikes on the Bushehr NPP on April 4. We are studying the incoming information on this matter. We strongly condemn this atrocity, which has led to human casualties," Zakharova was quoted as saying by the ministry.
Strikes on nuclear facilities in Iran that are under IAEA safeguards are an indelible stain on the reputation of those launching the missiles, Zakharova added.
Zakharova further urged to cease the strikes on Iranian nuclear facilities, including the Bushehr Nuclear Power Plant, to "prevent the worst."
"The Russian side is taking every effort to draw the attention of the international community and the global public to the fact that the situation at the Bushehr Nuclear Power Plant is increasingly approaching a dangerous point," she added.
Earlier in the day, the Atomic Energy Organization of Iran (AEOI) said that the Bushehr Nuclear Power Plant site came under fire from the United States and Israel, and one of its employees was killed.