Two men are in critical condition after the bike they were on crashed into a roundabout in San Gwann.
The accident took place on Tal-Balal Road at 4.30am on Saturday.
The two men, a 30-year-old from Nepal and another who is still to be identified, were riding a Kymco Agility.
They were both taken to hospital with serious injuries.
Magistrate Josette Demicoli is leading an inquiry.