The PSNI are investigating how a teenager suffered serious head injuries in Craigavon.
The 17-year-old youth was found lying unconscious in the street in the Meadowbrook area shortly after 3am by a passer-by who raised the alarm and called the police and the ambulance service.
He was detained in the Craigavon Area Hospital where his condition was described as serious.
A police spokeswoman said it was unclear whether the teenager and been the victim of an assault, had been hit by a vehicle or had fallen.
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Police have appealed for anyone in the Meadowbrook area around at the time or with any information to contact them.
PA