One killed in Paris knife attack by man shouting 'Allahu akbar'

Personnel are seen at the scene of a knife attack in Paris, France May 12, 2018 in this still image obtained from a video. REUTERS/Reuters TV

PARIS (Reuters) - An assailant shouting "Allahu akbar" killed a passer-by in a knife attack that also wounded four others in the heart of Paris late on Saturday before he was shot dead by police, French authorities said.

The country has been on high alert amid a series of attacks, commissioned or inspired by the Islamic State militant group, that has killed more than 240 people since 2015.