Police have arrested a convicted sex offender after he allegedly tried to snatch a 4-year-old boy off his bike at an Illinois park, as reported by Northwest Herald.

Woodstock police said that Kevin Sorensen, 39, pulled the child off his bike, picked him up, and tried to run off on Friday. Witnesses told WLS that yells from the boy and his siblings alerted them to the alleged kidnapping.

“The older brother was crying and screaming. There was another older sister. They’re scared. I mean, this old man’s trying to take their 4-year-old little brother,” Jonny Hunt said.

Another bystander, Sean Norton, described how Sorensen was “bear hugging” the child. Norton and Hunt said the suspect put down the child as they approached. However, a fight allegedly ensued as they restrained the man and called the police.

“Sean got on top of him. Me and the neighbor grabbed his shoulders and arms and held him down until the cops arrived,” Hunt said.

Norton commented, “It was something that I’ve never seen before. Something that most people won’t ever witness.”

Police said the suspect is a convicted sex offender who is no longer required to register. In 1993, Sorensen, who was 15 at the time, was charged with luring an 8-year-old boy into the woods and raping him, according to the Northwest Herald.

Though the outcome of the case is unclear, Woodstock Deputy Police Chief Jeffrey Parsons said told reporters at the time Sorensen was ordered to register as a sexual offender for 10 years.

Sorensen is charged with aggravated kidnapping, aggravated battery, unlawful restraint, and aggravated criminal sexual abuse—all felonies. He faces 30 years in prison if convicted of the most serious charge.

[Featured Image: Woodstock Police Department]