Four European countries have withdrawn from an online business forum in Iran’s capital, Tehran after the execution of journalist Ruhollah Zam. .
The ambassadors boycotting the forum are from France, Germany, Italy and Austria.
On Saturday, Zam was hanged for documenting mass protests in Iran in 2017 on his online news feed.
France called the execution "barbaric and unacceptable" and said it ran counter to Iran's international obligations. The EU also strongly condemned the killing "in the strongest terms".