The attack happened on Botanic Avenue in south Belfast
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A man is in hospital after being beaten repeatedly on the head with a bottle in south Belfast.
Police say the 34-year-old man lost a lot of blood in the attack.
It happened at Botanic Avenue at about 0430 BST on Saturday.
A man is helping police with their inquiries.
Detectives want to hear from two other men who were walking with the victim at the time of the incident.