A routine family visit to a popular Cambridgeshire zoo turned into a nightmare when a three-year-old boy was found critically injured inside a crocodile enclosure, triggering a major police investigation and the arrest of a man on suspicion of attempted murder.Emergency services were called to Johnsons of Old Hurst, a family-run zoo near Huntingdon, shortly after 1:20pm on Wednesday following reports that a child had entered a crocodile enclosure. The boy was rescued and airlifted to the hospital, where he remains in critical but stable condition. A 30-year-old man from Norfolk has since been arrested on suspicion of attempted murder.Police have said they do not believe the suspect and the child knew each other, and detectives are working to establish exactly how the incident unfolded. According to Cambridgeshire Police, officers were called to Johnsons of Old Hurst zoo after reports that a young child had ended up inside a crocodile enclosure. The incident triggered a large emergency response involving police, paramedics and an air ambulance.The three-year-old suffered serious injuries and was taken to Addenbrooke’s Hospital in Cambridge. Authorities later confirmed that he was in a critical but stable condition.A 30-year-old man was arrested at the scene on suspicion of attempted murder and remains in police custody while investigations continue. Detectives have not yet released further details about the incident’s circumstances.Witnesses and reports from the scene described a dramatic rescue operation as zoo staff rushed to save the child.Tracey Johnson, co-owner of the zoo, has been widely credited with entering the enclosure to help rescue the boy before any crocodiles could reach him. The zoo’s tropical house, where the reptiles are kept, is home to several crocodile species, including Nile crocodiles, among the world’s most dangerous predators.Emergency responders praised the zoo staff’s rapid actions, which are believed to have prevented an even more serious outcome. Authorities have not fully disclosed the exact nature of the child’s injuries. Cambridgeshire Police have launched a full investigation and are continuing to interview witnesses and examine evidence from the scene. Officers have urged the public not to speculate while inquiries remain ongoing.Local MP Ben Obese-Jecty described the incident as deeply distressing and asked people to allow investigators time to establish the facts. He also expressed sympathy for the child and his family.The zoo said it was cooperating fully with investigators and had temporarily closed its tropical house out of respect for the family affected. The remainder of the zoo has continued operating.