How did Belle Gunness kill her children?

I've been looking all over on how she killed her kids but it doesn't say. Does anyone here know?|||House fire





Joe Maxon, who had been hired to replace Lamphere in February 1908, awoke in the early hours of April 28, 1908, smelling smoke in his room, which was on the second floor of the Gunness house. He opened the hall door to a sheet of flames. Maxon screamed Gunness' name and those of her children but got no response. He slammed the door and then, in his underwear, leapt from the second-story window of his room, barely surviving the fire that was closing in about him. He raced to town to get help, but by the time the old-fashioned hook and ladder arrived at the farm at early dawn the farmhouse was a gutted heap of smoking ruins. The floors had collapsed and four bodies were found in the cellar. The grand piano was on top of the bodies. One of the bodies was that of a woman who could not immediately be identified as Gunness, since she had no head. The head was never found. The bodies of her children were found next to the corpse. County Sheriff Smutzer had somehow heard about Ray Lamphere’s alleged threats; he took one look at the carnage and quickly sought out the ex-handyman. Lawyer Leliter came forward to recount his tale about Gunness' will and how she feared Lamphere would kill her and her family and burn her house down.