Attacks at Ukraine Nuclear Plant Are Suicidal, U.N. Chief Warns

KYIV, Ukraine—The international crisis over the weekend shelling of Europe’s largest nuclear power plant deepened on Monday as Russia and Ukraine traded blame for missile attacks and the United Nations secretary-general warned that an attack on a nuclear facility would be suicidal.

Ukraine’s nuclear regulator Energoatom on Monday accused Russia of bombing power lines to sever the Zaporizhzhia plant from the Ukrainian electrical grid and goading Ukrainian forces positioned across the river into attacks. It said the plant’s staff were forced to close one of its six reactors over the weekend after an attack that severed a high-voltage power line, damaged three radiation monitors and shattered 800 square meters of window surfaces.