Paris Olympics opening ceremony could move if threat detected, says Macron

French president says location of spectacle, due to take place on Seine, could change if there is serious risk of terror attack

France has backup plans to move the opening ceremony of the 2024 Olympic Games from the Seine if there is a serious risk of a terrorist attack, Emmanuel Macron has said.

Speaking in a television interview on Monday, the French president said organisers could and would" continue to plan for a world first" opening ceremony for 26 July, when more than 300,000 people are expected to watch a flotilla of boats carrying national teams down the river.