French Journalist Alexander Aucott has taken this image showing the damage to the Smoking Dog pub in Lyon.
Witnesses described a group of up to 50 masked men, some making Nazi salutes.
Three people are reported to be in hospital, one with a head injury.
More top news
The news that Jeremy Clarkson, Richard Hammond and James May are to present a new show on Amazon Prime has been met with a mixed response.
Authorities say Ai Weiwei failed to disclose a previous "criminal conviction" - though his supporters say he was never even charged.
The supermarket made the change after getting feedback from customers who said they felt under pressure as they finished their shop.