Two Romanians who live in St Paul's Bay were injured in a fight, one of critically, in St George's Street, St Julian's early this morning.
The police said the two men, one aged 29 and the other 36, were allegedly injured with a sharp instrument at around 4.30 a.m.
The 29-year-old is in a critical condition while the 36-year-old suffered slight injuries.
The police are holding a 42-year-old man to help them in their investigations.
An inquiry is being held.