Is this the film? (discription) seeking title of film

It starts of, with this group of people, going into a deserted town, then some of the group start vanishing, like the camera would turn away from someone, and the next thing you know, they have vanished.

So they find the nearest building, enter it, check the rooms, there is a locked room, the door is broken down, there is a message on a mirror, thats all I can remember.

Is this the film? as I cannot remember the title.