Aaron Schaffhausen arrested in deaths of three girls RIVER FALLS, Wis., July 11 (UPI) -- A man was arrested in the deaths of three girls presumed to be his daughters, whose bodies were found in his ex-wife's River Falls, Wis., home, police said. Jail employees said Aaron Schaffhausen, 34, was booked into the St. Croix County jail Tuesday on probable cause for three counts of first-degree intentional homicide, the St. Paul (Minn.) Pioneer Press reported Wednesday. Authorities identified the girls as Amara, 11; Sophie, 8; and Cecilia, 5, the Minneapolis Star Tribune reported. River Falls police said in a statement the girls' mother called authorities Tuesday "with concerns for their physical safety due to statements made from the father of the children concerning their well-being." Officers went to the home, were met by the odor of natural gas and found the girls in the empty house. Police did not indicate how the girls were killed, the Pioneer Press said. Soon after the bodies were discovered, Schaffhausen turned himself in to police. Court record indicated Aaron and Jessica Schaffhausen were granted a divorce in January. Aaron Schaffhausen listed his address as Minot, N.D. "All of us [are] saddened by this tragedy," said Roger Leque, police chief for the community about 30 east of the Minneapolis-St. Paul area. We continue to work on determining answers to this tragedy. The mother is safe and assisting police. Officials at Greenwood Elementary School in River Falls said in a letter to parents that staff, counselors and a district crisis team were preparing to "help our school community deal with this tragedy."