A policeman was shot dead while two others were seriously injured by a Kalashnikov-wielding gunman on the Champs Elysees in central Paris - just three days before the French presidential election.
French police said the attack was probably a 'terrorist act' and the world famous avenue was on lockdown by 9pm.
Dramatic video footage captured the moment police shot dead the ISIS terrorist - who was known to security services - and had been flagged as an 'extremist'.
Police have now launched a desperate manhunt for a second suspect after heavily armed officers flooded the area in the heart of the French capital.
Officers are searching the home of the alleged shooter in east Paris and the man had previously said that he 'wanted to kill police' on the Telegram messaging service, according to BFM TV.
The fatal incident unfolded as presidential candidates, including National Front party leader Marine Le Pen, debated on a TV show nearby before Sunday's election.
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