A school bus has been filmed driving along a Cardiff road with the doors wide open.
The footage, shot by a student on board, shows the front doors open for the duration of the film despite the bus moving.
The bus is run by New Adventure Travel (NAT) Group and was on the 813 route between Lisvane and Ysgol Glantaf on Friday 6 December.
A NAT Group spokesperson said "there is no reason for a bus to be driven with the doors open, and any suggestion of that being the case would result in a formal investigation."
The mother of the school girl who captured the incident on camera said this is not the first time that the doors have opened "at random".
Not wanting to be named, she said she was particularly concerned for her daughter's safety.
She also claimed that there are no seats left as the bus passes have sold out. She said it is "odd that they still take people every day and are charging them. In my head if there's no bus passes left then there's no room left."
She added that the NAT Group bus is the only option available for her daughter to get to school.
A spokesman for NAT Group said: