Ottawa paramedics generic ambulance

Paramedics treated 11 people at a small private school in Ottawa after a chemical reaction released a gas that caused irritated eyes and throats. (CBC)

Nine students at an Ottawa private school were taken to the Children's Hospital of Eastern Ontario Wednesday with irritated eyes and throats after a chemical experiment at the school went wrong. 

Ottawa paramedics said a teacher and three students at the Higher Learning Institute at 3047 Carling Ave. were doing an experiment at about 11:15 a.m. ET, as they were mixing chemicals that produced a gas.

Several students reported shortness of breath and irritated eyes and throats, paramedics said. The building was then evacuated.

Paramedics assessed 11 people at the scene and took nine students between the ages of 10 and 17 years old to hospital. The injuries were minor, paramedics said.

Ottawa Fire Services removed the beakers of chemicals from the school and ventilated the building.

Meanwhile, about 20 people waited in an OC Transpo bus to keep warm.