A man was seriously injured during what police believe was a fight that broke out in a flat in Marsascala on Thursday evening.
The police were informed of a disturbance at the flat, in Il-Mindba Street, at 9.30 p.m.
There was no one there when they arrived but their investigations pointed to a fight having taken place.
Later that night they received a report that a badly wounded foreigner had been admitted to hospital.
In a statement, the police said the man had probably been involved in the Marsascala fight.
Magistrate Michael Mallia appointed a team of court experts to assist in an inquiry.