Iran called U.S. sanctions an "economic war" on Monday, and said there could be no talks with the United States until sanctions are lifted.
A day after Washington suggested it could hold talks without preconditions if Iran changed its behavior, Iran's Foreign Minister Mohammad Javad Zarif posted a video clip of a woman saying the prosthetic leg her son needs is sanctioned to Twitter.
He tweeted: "#EconomicTerrorism against Iran targets innocent civilians. Like this little boy, whose heartbroken mother can't get him prosthetic legs as he grows. They're sanctioned."
Reuters could not verify the authenticity of the video.
"This is @realDonaldTrump's 'economic war'. And war and talks – with or without preconditions – don't go together," Zarif added in the tweet.
U.S. Secretary of State Mike Pompeo said on Sunday that Washington was prepared to engage with Tehran without pre-conditions on its nuclear program, but first needed to see the country behave like "a normal nation."
Tensions between the two foes have escalated in the past month, a year after the United States pulled out of the 2005 Iran nuclear deal.
