Iran Talks Halted over US Sanctions
Kerry expects they will resume
Iran's delegation has left talks on the implementation of a deal over its nuclear programme after the expansion of a US sanctions blacklist.
US Secretary of State John Kerry said he expected the talks to resume in the next few days.
Iran said the US actions went against the spirit of an agreement brokered in Geneva last month.
Under the deal Iran agreed to curb some nuclear activities for six months in return for sanctions relief.