Road closure signs removed before bus crash
Three children were injured after a school bus collided with a partially fallen tree on the Glenavy Road, Lisburn, police have now confirmed.
Police said it appears road closure signage had been removed prior to the collision, which happened shortly before 16:05 GMT on Thursday.
Sgt Jones described the removal of signage as "extremely dangerous and could have resulted in a much more serious outcome".
The road was closed for a time but has since re-opened.
Emergency services, including police, the Northern Ireland Fire and Rescue Service and the Northern Ireland Ambulance Service, attended the scene.
It was initially thought two children had been injured.
Speaking after the incident on Thursday, Lagan Valley MP Sorcha Eastwood told BBC News NI the bus should never have been on the road in the first place.
"A number of local people have told me that basically signage was in place," she said.
"This could have been preventable because there are so many signs right across Lagan Valley at the minute to say 'there's an obstruction', 'please be careful on the roads', whatever it may be, and people are removing [the signs]."