Official US social media accounts posted about rise of ‘violent radical leftism’ after killing of Quentin Deranque in Lyon last week

The French foreign minister, Jean-Noël Barrot, has said he will summon Charles Kushner, the US ambassador to France, over comments related to the killing of the French far-right activist Quentin Deranque.

Deranque was beaten to death in Lyon last week during a fight with alleged hard-left activists.