Afghanistan, April 5 -- Iran warned on Saturday that U.S. and Israeli strikes on its nuclear facilities could trigger radioactive contamination and grave regional consequences.

Iranian Foreign Minister Abbas Araghchi has warned that U.S. and Israeli attacks on the country's nuclear facilities could lead to radioactive contamination across the wider region, raising the stakes in an already escalating conflict.

In a letter dated Saturday, April 4, and addressed to António Guterres, members of the U.N. Security Council and the head of the International Atomic Energy Agency, Araghchi said continued strikes could carry serious humanitarian and environmental consequences.

He described the attacks as "illegal" and said targeting facilities...