French election

A suspected radical Islamist possessing weapons and a pledge of allegiance to IS was arrested north of the capital.

And Greenpeace activists scaled the Eiffel Tower to unfurl a banner, sparking an emergency police meeting.

Centrist candidate Emmanuel Macron will take on far-right rival, Marine Le Pen, in Sunday's final round of the poll.

Various opinion polls have suggested a lead of 20 percentage points or more for Mr Macron.

The Republicans' François Fillon and Socialist Benoît Hamon urged supporters to vote for Mr Macron on 7 May.

EU heavyweights have also backed Mr Macron, the favourite in opinion polls.

Ms Le Pen quickly turned her fire on her rival, calling him a "weakling" for his anti-terrorism policies.

The victory of the two candidates in Sunday's first round meant that, for the first time in six decades, neither of France's main left-wing or right-wing parties had a candidate remaining in the election.

The three main candidates canceled campaign events and instead made televised statements in which they competed to talk tough on security and vowed a crackdown on ISIS.

One police officer died after a gunman wielding a machine gun leapt out of a car and opened fire on the Champs-Elysees, Paris's most famous boulevard, as candidates were engaging in their final TV debate.

The far-right candidate, Marine Le Pen, demanded the closure of all Islamist mosques. Prime Minister Bernard Cazeneuve accused her of trying to capitalize on the attack.