Police in Ards are appealing for witnesses to a road traffic collision on the Bangor to Ards carriageway on November 12.
The collision - which involved two cars - happened at 740pm close to the junction of Green Road. One male and one female are in a critical condition in hospital.
Inspector David McClements is appealing for anyone who was travelling on the Newtownards to Bangor dual carriageway last night and who witnessed the collision to contact police at Ards PSNI Station on the non-emergency number 101.
The carriageway has now reopened to traffic.