TORONTO - Ontario's Special Investigations Unit has been called in following a fatal crash involving a motorcycle and a York Regional Police cruiser.

Police say the head-on collision happened shortly after 11 o'clock Saturday night on the Queensville Side Road between Woodbine and Leslie.

The driver of the motorcycle was killed.

No other details have been released.

The SIU says it has assigned two forensic investigators and a collision reconstructionist to look into the crash.

Anyone who may have witnessed the accident is asked to get in touch with the SIU.