There are reports that the American citizens being illegally held as hostages in Tehran with the support of the Iranian Government might soon be put through some sort of "trial." This would be a flagrant violation of international law and basic religious principles, and the Government of Iran would bear full responsibility for any ensuing consequences. The United States is seeking a peaceful solution to this problem through the U.N. and every other available channel. This is far preferable to the other remedies available to the United States. Such remedies are explicitly recognized in the Charter of the United Nations. The Government of Iran must recognize the gravity of the situation it has created.
Jimmy Carter, American Hostages in Iran White House Statement. Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/249098