French investigators have arrested a close friend of the Paris knife attacker.
Abdul Hakim was detained in the north-east French town of Strasbourg and is being charged with conspiracy to take part in a terrorist attack.
Jawad Bendaoud denied knowing the identity of the men to whom he rented a small flat in Saint-Denis.
The relatives of those who died in the attacks in Paris and in Brussels have been left with one main question - why?
In a posh neighbourhood near the Paris Saint-Germain's football ground, police found four gas canisters doused with petrol and wired to connect to a mobile phone.
The attacker's car reportedly burst into flames after the impact, with the assailant having to be dragged out by police before succumbing to his injuries.
Thursday's shooting in central Paris risks thrusting national security and the spectre of terrorism back in minds of millions of French voters.
One police officer has been shot dead and two others wounded on Paris' Champs-Elysees Avenue after a gunman deliberately targeted officers.
A man has been shot dead at Paris’ Orly airport after trying to grab a soldier’s weapon.
Click here to see an updated version of this story with more reaction from France.
One of the world's most iconic landmarks is to be secured by a reinforced glass wall to protect visitors.