Morristown, New Jersey: As Iran began ramping up uranium enrichment, President Donald Trump accused the country of "doing a lot of bad things," and criticised the Iran nuclear deal, negotiated by President Obama, as "the most foolish agreement that you'll ever find."
Iran is pressuring European partners to find a way around the US sanctions and deliver the deal's promised economic relief.
The US unilaterally withdrew a year ago.
Iranian foreign ministry spokesman Abbas Mousavi told reporters Monday that Iran won't offer any further "deadlines" to save the deal by September.
The previous day, Iranian officials said the country would take further steps toward the "reduction" of its compliance with the accord after the deadline.
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Trump warned Tehran on Sunday that "Iran better be careful."
He didn't elaborate on what actions the US might consider.
