SOUTH BRUNSWICK, N.J. (CBSNewYork) – Officials are looking into what caused three students and two staffers to become ill at the Noor-Ul-Iman school Thursday.

The elementary school is connected with a mosque. It is located along Route 1 South.

The incident began at around 10:15 a.m., police said, when one 7-year-old turned blue passed out. Two other students fell ill shortly thereafter, followed by two staff members.

Some 200 children were in attendance the elementary school and day care. All of the children at the school have been evacuated, and the school has been closed for the day.

A preliminary sweep following the incident found nothing unusual at the school.

The three children, ages 7 and 8, were taken to area hospitals to be evaluated. The two staff members were treated at the scene and released.

“When everyone was evacuated into the field near the school there was no additional symptoms or complaints and all the people involved were from one specific classroom in the building,” South Brunswick Police Sgt. James Ryan said.

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