The CAC 40 index retreated to 5,063.36 points compared with the close on Thursday.

In Frankfurt, the DAX 30 inched up to 12,032.78 points and outside the eurozone, London's benchmark FTSE 100 gained around 0.2 percent to 7,129.63.

A known terror suspect shot dead a French policeman and wounded two others Thursday on Paris's Champs Elysees in an attack claimed by the Islamic State group days before a presidential election.