A 33-year-old man who lives in Sliema was grievously injured early on Sunday in an argument at Gżira.
The police said the man, who is Turkish, had an argument with another man who has not yet been identified in Triq ix-Xatt at around 4.30am.
He was given first aid by a medical team on site and was then taken to hospital by ambulance.
The police are investigating.