The PSNI has confirmed that an 18-year-old died following a road traffic collision in Markethill, Co Armagh.
Daniel McCallister, from the Tandragee area, died in hospital on Wednesday afternoon from injuries sustained in the collision.
The incident occurred when a blue Volkswagen Jetta and a blue Volkswagen Touran collided on the Cladymilltown Road on Sunday.
The other driver remains in a critical condition in hospital.
The PSNI's Roads Inspector Cherith Adair said detectives "are investigating the circumstances of the collision".
The PSNI urged witnesses or anyone who may have captured dash-cam or other footage which could assist with our enquiries to contact them.