A 51-year-old man from Naxxar suffered life-threatening injuries during a fight following an argument in a Paceville car park last night, the police said.
The argument broke out at the barrier of the car park between the victim and some persons in a following car at around 11.30pm. Some relatives and two security officials intervened.
The victim was rushed to hospital in an ambulance. The two security officers were slightly injured.
The police are trying to trace the other persons involved.
An inquiry is being held.