Old black and white horror movie, family returns for a reunion in a old house after many years.

It’s an old black and white horror movie.
A group of people (a couple?) is stuck in a old house, maybe because of a storm (not sure). I remember the house being empty. There’s a locked room upstairs and some family paintings with one person’s face scratched out. Slowly, other people start to arrive. First they seem to be also lost, but it’s revealed they are family members coming for a reunion in the house, after many years a part, so they can open the locked door upstairs and release an old relative locked inside. When they do, they find out he escaped thorough the window. He start hunting them all, one by one.