Four killed during stabbing spree in Illinois
The victims are a 15-year-old girl, a 63-year-old woman, a 49-year-old man and a 22-year-old man.
A man, 22, has been arrested and is being questioned by police.
Police said the motive for the attacks remained unclear.
The home invasion occurred on Florence Street but the attacks unfolded at multiple locations, police say.
Winnebago Country Sheriff Gary Caruana said a young woman had sustained stab wounds to her hands and face after being seen running away from the suspect.
The woman is now in hospital and is being intubated.
Another man, described by Sheriff Caruana as a “good Samaritan”, sustained less serious stab wounds after trying to intervene to help the woman.