The Foreign Office condemns his arrest as a "flagrant violation of international law".Read more
BBC News Middle East
Canada's PM says Iran's admission on the plane's downing is a first step but more are needed.
The funeral has taken place of the Arab world's longest-serving ruler, who died on Friday.
Demonstrators in Tehran called for resignations and accused officials of lying.
Ukraine's top security official tells the BBC what investigators in Tehran have uncovered.