Black and white horror movie where people have a mark on their palm and become voodoo-resurrected

Question

I'm searching this movie for years. It starts inside a cafe, I think, on a rainy night. The protagonist sees his recently deceased brother passing outside. It has to do with a voodoo cult, people when they die they melt like wax. It's in urban environment for what i remember. Ends with some guy waving to the protagonist with a mark in his palm, meaning that the cult is not dead.