A teenager is fighting for his life after being knocked down early on New Year's Day.
The 18-year-old man suffered serious injuries when he was struck by a car at the Monagh Bypass in west Belfast.
A PSNI spokesman said the accident, which happened just before 2.15am on Sunday, was not being treated as a hit and run.
The victim, named locally as Jody Watson from Poleglass in Belfast, was taken by ambulance to the Royal Victoria Hospital where a spokeswoman described his condition as "critical".
It is understood the victim had been trying to hail a taxi when the incident happened.
SDLP councillor for the area, Tim Attwood, said people in the area were stunned by the news.
Meanwhile, a man in his 20s has also been left fighting for his life after being attacked in Belfast.
He suffered head injuries when he was set upon at Alliance Parade in north Belfast early on New Year's Eve. He was taken to the Royal Victoria Hospital's trauma unit and was last night described as being in a "critical" condition.
A 29-year-old man has been arrested in connection with the attack. A PSNI spokesman said the incident was not being treated as sectarian. Sinn Fein councillor for Ardoyne, Gerard McCabe, said he hoped the victim would make a full recovery.
In Ballymena a woman of 36 and a 46-year-old man suffered serious but not life-threatening injuries in an assault.
The pair were taken to hospital after being targeted in the Ballymoney Street area of the town just before 2.50am yesterday.
A police spokesman said two men aged 30 and 25 were arrested in connection with the attack.