Four men are expected to be charged with murder on Tuesday over the mysterious daylight bashing of Vergel Velasquez in a western Sydney apartment block the day before New Year’s Eve.

Homicide squad detectives arrested four men, aged 41, 42, 50 and 49 on Tuesday in Moree in the state’s north-west – 620 kilometres from the Girraween complex where Mr Velasquez was left in the unit’s stairwell with head injuries.

It is expected they will be charged with murder to face court on Wednesday.

Mr Velasquez died in Westmead Hospital on New Year’s Eve.