Updated

The Iranian parliament speaker says any U.S. move against a nuclear deal with Iran be an insult to the United Nations.

Ali Larijani spoke on a visit to Russia on Friday hours before President Donald Trump delivers a speech expected to contain harsh criticism of the 2015 accord and Iran's activities that troubled Washington and its allies.

The agreement offered Iran relief from crippling economic sanctions in exchange for strict limits on its nuclear program. It involved a coalition of powers including the U.S., Britain, France, Germany, Russia and China.

Larijani said the accord has received a U.N. blessing, so any move to spike it would represent an "insult to the U.N." He added that any revision of the deal would allow Iran to take its own action.