A French man has been missing in Iran since mid-June, France's minister responsible for the country's residents abroad said on Monday, adding that Paris had no details on what had happened to the man.

The family of a 19-year-old Franco-German cyclist arrested in Iran while on a Europe-to-Asia bike trip has said he is "innocent" and demanded proof he was alive from Iranian authorities.

A French man has been missing in Iran since mid-June, France's minister responsible for the ... in a bid to pressure Tehran over the detention of its two citizens.