A 34-year-old woman is in critical condition after she was stabbed outside a Zabbar bar on Sunday night.
The incident happened just outside the St Patrick's football club, corner with Triq is-Santwarju at 8.15pm.
A 33-year-old man was arrested after turning himself in. He had bloodstains on his clothes and a hand injury.
A substance believed to be drugs was found in his possession.
Both the aggressor and the woman are from Safi.
The relationship between the two has not yet been established.
Police said the woman suffered head injuries.
She was operated upon her arrival at Mater Dei Hospital.
An inquiry is ongoing.