Police say four adults and two children were killed when a vacation home burned down in southern Sweden. The victims were Danish citizens. Photographs from the scene showed nothing but rubble and two brick chimneys remaining from the countryside house outside Tidaholm, 270 kilometers (170 miles) southwest of Stockholm. Police spokeswoman Jeanette Arvidsson said Monday it was unclear when the fire started but that the house had burned to the ground by Sunday morning, according to a report of the Associated Press.