A man aged 45 is in hospital with serious head injuries following an incident in Portadown, Co Armagh.
The PSNI were called to the Magowan Buildings car park in Portadown at around 2 a.m. after reports of a serious disturbance involving around 30 people.
When they arrived they found the man lying in the car park suffering from serious head injuries.
The area has been sealed for forensic examination.