Activists and trade unions held rallies across Europe and the rest of the world to mark May Day, the International Workers Day.
European Union Energy Commissioner Maros Sefcovic says Europe could import natural gas from Turkmenistan via Iran as the EU tries to break its dependence on Russian-sourced energy.
Iranian Foreign Minister Mohammad Javad Zarif said in an interview on U.S. television that there are no political prisoners in Iran.
Iran is actively trying to buy nuclear technology through blacklisted companies, according to a confidential UN report that surfaced April 30.
U.S. Republican senators with White House aspirations have turned Iran into a punching bag in recent days and are seeking to block any nuclear arms deal President Obama negotiates with Iran.
Iranian Foreign Minister Mohammad Javad Zarif and U.S. Senator Tom Cotton have had a forthright exchange of views on Twitter in a new war of words between the two men over nuclear negotiations and a potential nuclear deal.
Denmark's Maersk Line shipping company has urged Iran to release the Maersk Tigris cargo ship and its crew.
Iran's top diplomat has suggested that an intelligence operative, possibly linked to the U.S. government, may have taken advantage of Washington Post journalist Jason Rezaian, who was jailed in Iran on espionage charges.
The United States sought Iran's help to bring Yemen's warring parties into talks on a political settlement when U.S. and Iranian foreign ministers met on April 27, U.S. officials said.
An Iranian opposition leader says that Iranians have dubbed their government the "godfather" of the Islamic State militant group.
The U.S. Senate has rejected an effort to tie sanctions relief for Iran under an international nuclear agreement to a requirement that President Barack Obama certify that Tehran is not supporting acts of terrorism against Americans.
Iran's foreign minister says Tehran respects freedom of navigation in the Persian Gulf, a day after Iranian patrol boats seized a container ship under a Marshall Islands flag in one of the world's busiest oil shipping lanes.