Iran sanctions- what is happening?

The US is implementing economic sanctions on Iran after pulling out of the Joint Comprehensive Plan of Action.

Announcement via Twitter from Donald Trump

Official State Department policy towards Iran
this includes fact sheets on sanctions against Iran

Reactions

EU statements and policy towards Iran

Joint statement by the EU, German, French and UK Foreign Ministers following the re-imposition of US sanctions on Iran due to its withdrawal from the Iran nuclear deal Guardian editorial

background on the

Joint Comprehensive Plan of Action which the USA withdrew from earlier this year

Iranwatch - Wisconsin project on Nuclear Arms Control has information on sanctions.

Think tank analysis
Brookings Institution
Chatham House
Council on Foreign Relations
Foreign Policy magazine