USA - A US official is warning investors, banks and businesses in Europe not to work with Iran in the wake of the United States’ unilateral pressure on Tehran. “If you’re a bank, an investor, an insurer or other business in Europe, you should know that getting involved in the INSTEX special purpose vehicle is a very poor business decision,” Tim Morrison, the National Security Council’s senior director for weapons of mass destruction and biodefense, said at a Foundation for Defense of Democracies on Wednesday. Morrison made the comments after Tehran informed the five remaining signatories to the 2015 nuclear deal of its decision to suspend the implementation of some of its commitments under the multinational agreement. Morrison described the measure as "nothing less than nuclear blackmail of Europe," further threatening that those not complying with US sanctions "will be found and held accountable."