Emergency services said that 15 students have been taken to the hospital after they were exposed to an "unknown substance" while on board a school bus.
Ottawa, Canada paramedics said that there were 40 students on the bus at the time when they arrived at the scene at about 9:20 a.m. Thursday morning.
Paramedics received a call of children, ages 6 to 12, vomiting, coughing and feeling nauseous, according to reports. 15 of the 40 students were taken to a nearby hospital as a precautionary measure.
According to the Conseil des écoles catholiques du Centre-Est, Ottawa’s French Catholic school board, the health issues experienced by the students were likely to be caused by the warming of the bus’ brake system, reported "Global News."
A spokesperson for Ottawa Fire Danielle Cardinal said that the HAZMAT crew was notified and they determined that there was no further risk to surrounding neighborhoods or the school.
Cardinal went on to commend the bus driver who handled the situation exceptionally. The bus driver helped evacuate the students out the back of the bus in an orderly fashion.
"She really had the care of the kids at heart," Cardinal said.
Paramedic spokesman Marc-Antoine Deschamps said that the injuries were minor and all children are now in stable condition. The children are from École Élémentaire Catholique Lamoureux.
There are no additional details available at this time.