A school bus carrying over 40 children and one adult on the first day of the new school year rolled over onto its side in Austin, Texas, on Wednesday, leaving 12 injured, officials said.

The bus was carrying students from the Leander Independent School District in northwest Austin in Travis County.

Austin-Travis County emergency services were dispatched to the scene on Nameless Road in Travis County just after 3:15 p.m. local time.

Officials said there were 42 children and one adult on the bus at the time.

Photos from the scene show the yellow school bus rolled over into an embankment surrounded by trees, with the vehicle appearing to have significant damage.

Of those injured, 12 people were transported from the scene to a local hospital and the remaining people were taken to a reunification center for further evaluation and to be reconnected with family.

One individual has a life-threatening injury and two others have potentially life-threatening injuries, Austin-Travis County officials said during a press conference Wednesday evening.

The rest have non-life-threatening injuries, officials said.

It has not yet been released whether the adult on board was among those transported.

ABC News' Irving Last contributed to this report.