FILE PHOTO: Iranian Ambassador to the United Nations Majid Takht-Ravanchi speaks to the media outside Security Council chambers at the U.N. headquarters in New York, U.S., June 24, 2019. REUTERS/Shannon Stapleton

DUBAI (Reuters) - Iran’s ambassador to the United Nations dismissed as “unbelievable” what he said was President Donald Trump’s call for cooperation given Washington was imposing sanctions on Tehran, Iran’s state news agency IRNA reported on Thursday.

Majid Takht Ravanchi, in what appeared to be Iran’s first official reaction to Trump’s address after an Iranian missile attack on Iraqi bases housing U.S. troops, was quoted as saying Washington had “initiated a new series of escalation and animosity with Iran” by killing an Iranian general on Jan. 3.