The coach that was involved in an incident yesterday (Sunday) is to be examined by police.
It has emerged that people were queuing for the toilet when a door on the coach opened and a nine-year-old boy fell from the moving vehicle.
The boy was initially taken to the Queen Elizabeth Hospital in King’s Lynn and transferred to Addenbrooke’s Hospital in Cambridge last night. He remains in a critical condition following the incident on the A47 at Tilney All Saints.
Police are today continuing with investigations into the circumstances of how the boy came to fall from the coach as it travelled on a stretch of single carriageway at Tilney All Saints.
The incident happened shortly before 3.45pm as the group of 30 passengers, 20 children and 10 adults, travelled home to Lincolnshire after the youngsters, from Stamford Rugby Club, had played in a tournament at Holt in north Norfolk.
The boy’s father was travelling on the 71-seater double-decker coach while his mother was travelling in a car as part of the convoy.
Inspector Chris Brooks, from roads policing, said: “This is a very difficult time for the boy’s family and we have specially trained officers supporting them.
“We’ve already interviewed some of the passengers on board as well as drivers who in the area at the time of the incident.
“As a result of initial enquiries we know just prior to the incident that people were queuing for the toilet. Somehow, the door has opened and the boy has fallen from the moving coach.
“The coach was recovered yesterday and is being kept in a secure compound. The vehicle will be examined by police and VOSA investigators and this is the focus of our enquiry at this stage.
“We will also be speaking to other people who were on board at the time of the incident and it would be inappropriate to speculate on possible causes at this stage.”
Anyone who witnessed the incident is asked to contact the Serious Collision Investigation Team at Norfolk Police on 101.