A man is in critical condition after he was stabbed at the Ħal-Far open centre, the police said.
The man was involved in an argument with another individual before the stabbing took place around 1.45pm.
A medical team rushed to the scene before taking the victim to Mater Dei hospital where he was operated upon. The aggressor has been arrested.
The police gave no further details though both the victim and the aggressor are believed to be Libyan nationals.
A magisterial inquiry has been ordered. The police are investigating.