PARRY SOUND -- Provincial police say two officers were sent to hospital while investigating a crash near Parry Sound on Thursday morning.

Investigators say the crash involved two commercial trucks, and resulted in a chemical spill on the Key River Bridge.

They say one of the responding officers was exposed to a potentially hazardous chemical and was taken to hospital for medical assessment.  The officer was assessed and released.

Police say a second officer was conducting traffic control when she was seriously injured.

They say she was in her cruiser with all of its emergency lights activated when it was struck by a northbound vehicle, and taken to hospital.  She has serious, but non-life-threatening injuries.

Police say the cause of the initial crash is still being investigated, and there's no threat to public safety at this time.