Two Kapolei Elementary students and five faculty members were treated at a hospital Thursday after complaining of headaches, nausea and sore throat caused by a chemical odor at the campus.

A Honolulu Fire Department hazardous materials crew was called to the school on Kamaaha Loop around 9 a.m. to investigate complaints of a strong odor.

Honolulu Emergency Services Department spokeswoman Shayne Enright said paramedics and fire employees were already on site for a career day event.

"At first there were only a few patients, and then more and more patients started complaining of shortness of breath, itchy eyes, sore throat, cough — all very consistent with pesticides being sprayed in the area," Enright said.

She said paramedics evaluated and treated more than 40 adults and students. One person was transported in serious condition to an area hospital.

The other six were transported in stable condition to a hospital.

The odor was identified as insecticide from a nearby resident’s yard, but fire officials told the school administration that the air quality did not require evacuation of the area.

Students were kept indoors at the campus, which is fully air-conditioned. Lunch and recess were held indoors.

Parents were notified about the incident.