A 23-yer-old man from Siggiewi was grievously injured when the car he was driving crashed into a tree in Triq Mgr Mikiel Azzopardi at 3.25pm.
The police said the man was driving a Ford Escort in the direction of Zebbug. His 25-year-old male passenger from Gzira was not injured.
The driver, who was extracted out of the vehicle by members of the Civil Protection Department, was taken to Mater Dei Hospital by ambulance.