On Saturday there was a huge pro-Palestine protest in France, even though it was originally banned by police.
The riot quickly escalated as protesters threw stones, metal bars, and bottles at police, who responded to the violence with tear gas.
A ban was put on pro-Palestine protests last week, after demonstrators tried to storm two synagogues during a recent protest, the BBC reports.
On Thursday, Israel began ground operations in Gaza, following air strikes that failed to stop rockets fired by Hamas.
Israel has said its ground invasion is necessary to "target a network of Hamas tunnels."