Summerside Deputy Police Chief Sinclair Walker said alcohol is believed to be a contributing factor and there was extensive damage to both vehicles.
The female driver of one of the vehicles was taken to Prince County Hospital and later released.
The off-duty Summerside police officer was taken into custody as he was alleged to be one of the drivers.
The officer involved has been on extended leave for the past 11 months.
The RCMP were requested to assist in the investigation, which is continuing.
Walker said it is customary to call on an outside police agency to assist in an investigation when a police officer is involved. The name of the off-duty officer has not been released and no charges have been laid, according to an RCMP spokesperson.
No further details are being released at this time.



peoples are NEVER printed until they are found guilty in th e courts.