A 28-year-old man who was injured in a New Year's Eve brawl in Yuen Long later died in hospital. Police have arrested four men in connection with the murder and fighting case.

At about 2.30am on January 1, a gang fight occurred outside a karaoke in Kau Yuk Road.

The victim was injured in the fight and his friends took him to North District Hospital where he was certified dead at 3.50am.

Police officers arrested four men, aged 21 to 29, in Yuen Long and Tin Shui Wai yesterday afternoon.

A post mortem will be conducted to determine the cause of the man's death.