DURHAM, N.C. (AP/WTVD) - Emergency personnel in North Carolina say it was sodium hypochlorite which leaked at a YMCA, leading to an evacuation and sending six children to area hospitals.

A statement from Durham police says the chemical was released around 2:45 p.m. on Wednesday at the downtown YMCA. A statement from police says six of the 40 children evacuated were taken to local hospitals in serious condition, while 34 children and two adults were treated for non-serious injuries.

According to ABC11 in Raleigh, the children ages range from 6 to 12-years-old. WTVD reports that those hospitalized are experiencing symptoms such as vomiting, respriatory illness, and skin and eye irritation.

According to police, those transported were exhibiting symptoms such as vomiting, respiratory illness, and skin and eye irritation.

Initial reports indicated there was a chlorine leak at the YMCA.