A 52-year-old man was seriously injured on Thursday following a crash between two jetskies at Tunney Net Bay in Għadira.
The police said the accident happened at 1pm.
The jet skies were being ridden by two Brits, the victim and a 25-year-old man. The 52-year-old was taken to Mater Dei Hospital by ambulance.
An inquiry is being held.
Police investigations are continuing.