Iran abruptly cuts off nuclear talks in Vienna

Iranian negotiators abruptly ended nuclear talks with Western powers in Vienna on Friday just a day after the Obama administration announced tighter sanctions on Tehran. They left Vienna for “consultations” about how to proceed next. Tehran has warned that tighter sanctions would nullify the interim nuclear deal reached with the six powers in Geneva last month. The Vienna talks were broken off before setting a date for the six-month nuclear freeze period to start.