GSOC say they're investigating last night's fatal collision on the N2 in County Meath.
A woman in her twenties died in the two car collision at Waterside Great, between Slane and Ashbourne.
It's understood a Garda vehicle was pursuing a car involved in the crash.
One woman suffered fatal injuries - two men and two women were taken to hospital but their injuries were not life threatening.
Anyone who witnessed the incident is asked to contact Gardaí at Slane.