The incident happened outside a taxi office during the early hours of this morning
Detectives in the North are appealing for witnesses following an alleged serious assault in Bangor, Co Down.
The incident happened at around 1.40am this morning.
It was reported that a 45-year-old man was standing outside a taxi office in the High Street area of the town when he was assaulted.
He was taken to hospital for treatment for a serious head injury.
The PSNI is appealing for any witnesses to contact them.