Aaron Schaffhausen, 34, whose last known address was Minot in North Dakota, was arrested yesterday afternoon after police discovered the bodies of his daughters Amara, Sophie and Cea at Morningside Avenue in River Falls, Wisconsin, at around 3.30pm.
A police news release stated that officers were sent out after the girls' mother contacted them to say she was concerned, following a comments by Mr Schaffhausen.
Shocked: Trina Lassi, 32, who lives near Morningside Avenue, was quoted on the Leader Telegram described them as a very nice family
Killed: Amara, Sophie and Cea Schaffhausen, pictured, were found dead at their home yesterday
Incident: When officers arrived at the address in Morningside Avenue they smelled natural gas, but it is still unclear what caused the girls' death