A US cat that is reportedly able to sense when a nursing home's residents are about to die is baffling doctors. Oscar has a habit of curling up next to patients at the home in Providence, Rhode Island, in their final hours.

According to the author of a study in the New England Journal of Medicine, the two-year-old cat has been observed to be correct in 25 cases so far. Staff now alert the families of residents when he sits down next to their ailing loved one.