Russian Foreign Minister Sergey Lavrov, right, and Iranian Foreign Minister Hossein Amir-Abdollahian shake hands after a joint news conference following talks in Moscow.  AP
Russian Foreign Minister Sergey Lavrov, right, and Iranian Foreign Minister Hossein Amir-Abdollahian shake hands after a joint news conference following talks in Moscow. AP

Iran denies nuclear deal delay linked to Russian demands amid Ukraine crisis