A man, 31, was arrested on Tuesday morning after a shooting incident at St George Street, Għargħur.
The shooting took place at about 9.30am.
A 58-year-old man from Mosta who is a relative of the alleged shooter was slightly injured and hospitalised.
The shooting followed an argument between family members.
The shooter fled the scene but was arrested shortly after by policemen from the Rapid Intervention Unit.