Autopsies are scheduled for three children who died while swimming in central Iowa during a Fourth of July outing with family and friends. Marshalltown Police Chief Mike Tupper says the two girls, one 7 and the other 9, and one 7-year-old boy found Wednesday night in the Iowa River were related to each other. The children became separated from others while swimming in the river in Marshalltown, about 50 miles northeast of Des Moines. Authorities searched for more than three hours before finding them. Tupper says drought has left the river ankle deep in some places, but that pockets of 12-plus feet of water remain. He says autopsy results are expected Thursday or Friday. Authorities are not releasing the names pending notification of family members.