New US sanctions against Iran's energy sector point to Washington's "lack of goodwill and seriousness" over dialogue with Tehran, Iran's Foreign Ministry spokesperson Esmaeil Baghaei said on Wednesday ahead of Iran-US nuclear talks this weekend.
The sanctions targeted Iranian liquefied petroleum gas and crude oil shipping magnate Seyed Asadoollah Emamjomeh and his corporate network on Tuesday.
Emamjomeh's network is responsible for shipping hundreds of millions of dollars' worth of Iranian LPG and crude oil to foreign markets, the US Treasury said in a statement.
Expert-level Iran-US talks that were supposed to take place on Wednesday will be shifted to Saturday, Tehran's foreign ministry spokesperson said, with a third round of high-level nuclear talks due on the same day in Oman.
Iran and the United States agreed on Saturday to begin drawing up a framework for a potential nuclear deal, Iranian Foreign Minister Abbas Araqchi said after the talks in Rome.