(KMOV) – Two southwest Missouri children are dead after falling into a partially frozen pond. The brother and sister were sledding near Southwest City, Missouri. Officials say the 12-year-old boy was trapped below the ice for nearly an hour, and his 9-year-old sister for nearly five hours. Authorities say the ice was more than an inch thick in places, but thinner near the center of the pond. Rescuers had to cut through the ice to find the children.