Senior Iranian leaders verbally attacked President Donald Trump late Tuesday and early Wednesday following his first United Nations address, in which the U.S. president harshly criticized Iran for its support of global terror operations, according to regional reports.

Iranian political and military leaders, including the country’s president, mocked Trump for his criticism of the Islamic Republic and threatened military repercussions if the United States decides to leave the landmark nuclear agreement, which Trump hinted could be a possibility on Wednesday.

In brief remarks to reporters following a meeting with Palestinian President Mahmoud Abbas, Trump said, “I have decided” on whether to designate Iran in violation of the nuclear deal, a move that would set the wheels in motion for the United States to leave the agreement and reimpose tough sanctions on Tehran.

When pressed on the issue, Trump smiled and said, “I’ll let you know what the decision is.”