Cary, Ill. ? A 10-year-old boy was in critical condition Sunday after three pit bulls escaped from a home and went on a rampage, attacking six people before police shot and killed the dogs, authorities said.

No charges had been filed Sunday, but McHenry County Sheriff Keith Nygren said it was being investigated as a crime scene.

Neighbors said the attacks started late Saturday afternoon when children going door-to-door for a fundraiser arrived at the home of Scott Sword, 41, who owned the dogs.

“I looked out the window, and I saw a young boy,” said Debby Rivera, who lives three houses away. “The dogs were just jumping on him.”

“The screams were horrible,” she said. The dogs were “relentless, like they were possessed.”

The pit bulls attacked the two children, and when the dogs’ owner tried to stop them, the dogs turned on him and bit off his thumb, Nygren said. The boy’s father also tried to protect his son and was attacked. The dogs went after another neighbor as well.

Residents tried to distract them from attacking before police arrived and shot the animals.

The boy who was attacked, Nick Foley, was hospitalized in critical condition Sunday. His friend Jordan Lamarre, also 10, was in serious condition. Nick’s father was listed in good condition. Sword and two others were treated for injuries and released.