TL;DR
A three-year-old boy was critically injured after falling into a crocodile enclosure at a zoo in Cambridgeshire. A 30-year-old man has been arrested on suspicion of attempted murder.
A family visit to the zoo turned into a living nightmare when a three-year-old boy ended up in a crocodile enclosure and was seriously injured.
Cambridgeshire Police have arrested and bailed a 30-year-old man on suspicion of attempted murder, following the incident at Johnsons of Old Hurst near Huntingdon on Thursday.
The toddler was attacked by at least one crocodile, the BBC understands, and was taken to hospital.
Police said the boy remained in a "critical but stable condition" two days after the incident.
The zoo at Johnsons of Old Hurst is in the Cambridgeshire village of Old Hurst, north of Huntingdon, and has more than 100 animals including lions and tigers.
The fully licensed site includes a farm, cafe and butcher's shop, which opened 20 years ago, while its crocodile house was built in 2009.
Visitors can see Nile crocodiles, broad-snouted caiman and American alligators, which are kept in a converted barn with metal-fenced, elevated walkways.
Mike Annicelli, 52, lives near the zoo and said the crocodiles were about 15ft (4.5m) below the "raised platform".
A woman who visited on Thursday said the crocodile enclosure included "quite high fences" and said there was "steel mesh fencing" all around the viewing platform.
She said the crocodiles appeared calm and largely motionless during her visit, about 10 minutes before the incident happened.
Cambridgeshire Police said the boy had been visiting with his family when the incident happened at about lunchtime.
Andy Johnson, who runs the zoo, told the BBC that his wife Tracey jumped into the enclosure to rescue the boy.
Police confirmed that he was pulled out by staff, and said they were working to establish how long he had been in the enclosure.
A friend of the Johnsons, Chris Newman, said he had been told Tracey Johnson was not injured.
"She put herself in immense danger," he said.
"She'd always put her own life at risk to save someone else. She's an extraordinary lady and very brave."
One visitor, who wished to remain anonymous, said she "didn't see the incident itself, but heard the screams" and added that she later saw staff and an air ambulance responding.
Police arrested the man from Norfolk on suspicion of attempted murder.
He has not been named, but officers said he was white-British and they did not believe he knew the child.
The suspect is believed to have learning disabilities and had been on a trip to the zoo with carers.
He was released on bail until 18 September, and police said he was "assessed as not being fit for interview".