Russia first used the Oreshnik against Ukraine in November, when it fired the experimental weapon at a factory in Dnipro that built missiles when Ukraine was part of the Soviet Union. View on euronews

Kelly didn't clarify which cruise missile technology he was referring to when he accused China of supplying information to Putin's military. However, recent reports suggest that Ukrainian forces found foreign components in Russia's new "Banderol" cruise missile, including microchips from China.

The Russian president says Moscow's initial tough demands must be met, despite a looming US sanctions deadline.