ReutersA trainee drove a bus into the River Seine after hitting a parked car and veering off the road on Thursday morning, officials have said.
The local transport authority told the BBC the driver was nearing the end of her "practical learning" during the incident in Juvisy-sur-Orge, some 20km (12 miles) south of Paris.
Drug and alcohol tests have come back negative, a spokesperson said, and the cause of the incident is currently unknown.
L'Esson prefecture said all four passengers on board had been rescued from the water, where more than 90 firefighters, divers and police took part in a recovery operation.
A spokesperson for Île-de-France Mobilités said the driver was accompanied by a "lead driver" and two passengers.
Its president had ordered an internal investigation into the incident, it added.
Local politician Claire Lejeune wrote on X that the bus fell into the Seine "with four people on board, including a trainee driver" and thanked emergency services for their response.
ReutersJuvisy-sur-Orge Mayor Lamia Bensara Reda said the driver had "lost control" of the vehicle near a station close to the riverbank, "before plunging into the Seine and dragging a parked car" with it.
"Everyone was quickly rescued and, thankfully, is safe and sound," she added in a post on Facebook.
ReutersL'Esson prefecture said the number of casualties was still being finalised.
French news agency AFP reported that several rescue boats, a drone and helicopters were deployed as part of the recovery effort.
