Looking for 70s or 80s French police film

I think the film was a French policier. It starts with a bank robbery. The visitors of the bank have to put brown paper bags over their heads. When the money doesn't come fast enough, the robbers shoot one of them. His blood splashes on the glass. I think the robbers then hide in some apartment. There is a girl. And I think they took some journalist as a hostage, who later decides voluntarily to stay with them, probably to be able to write an article about the whole story. In the end, there is a car chase and in two trucks block the street from both sides. Then the side of the truck falls away and police with machine guns on stands brutally execute the robbers (and the journalist) in their car.