Ms Singco – who was a backseat passenger in one of the vehicles involved in the crash – died in hospital from her injuries, with her unborn baby also dying as a result.
The Moira Road in Crumlin was closed in both directions between Nutts Corner roundabout and the Ballydonagh Road following the crash involving a blue Ford Fiesta and a silver Skoda Superb.
Emergency services, including the PSNI, the NI Fire Service (NIFRS) and the air ambulance, were dispatched to the scene.
The NIFRS dispatched two appliances from its Crumlin Road station and one from Springfield station.
A PSNI spokesperson confirmed a man in his 30s who was a passenger in the same car as Ms Singco has been critically injured and said a number of others involved suffered minor injuries.
He is understood to have been Ms Singco’s husband.
PSNI Detective Inspector Stewart, of the Collision Investigation Unit said: “We can also confirm that, sadly, Cathrene was pregnant and her baby also died as a result of the collision. Our thoughts are with her family and friends at this time.
“We are investigating what happened and require the public’s assistance with our enquiries.
“Anyone who witnessed the collision, or who may have any dash-cam footage of the road at the time which could assist with our investigation, please contact us in the Collision Investigation Unit on 101, quoting reference number 735 11/01/26.”
A spokesperson for the Northern Ireland Ambulance Service (NIAS) said: “NIAS received a 999 call at 14:05 on Sunday, 11th January, following reports of a road traffic collision in the Moria Road area, Crumlin.
Cathrene Kith Quiñones Singco
News Catch Up – Monday 12 January
“NIAS dispatched six emergency ambulances, three ambulance officers, two HART Teams and the Charity Air Ambulance with HEMS on board were also tasked to the scene.
“Following assessment and initial treatment at the scene, four patients were taken to Antrim Area Hospital by Ambulance while another four patients were taken to Royal Victoria Hospital, Belfast, three by ambulance and one by Air Ambulance.”