KYIV, Ukraine (AP) — Ukraine claimed Thursday that Russia launched an intercontinental ballistic missile overnight at one of its cities, but American officials said an initial U.S. assessment indicated the strike was carried out with an intermediate-range ballistic missile.

Russia launched an intercontinental ballistic missile during an attack on Ukraine on Thursday, Kyiv's air force said, in the first known use in the war of a powerful weapon designed to deliver nuclear strikes thousands of kilometres away.