Updated Wednesday 7am, adds condition
Forensics experts at the scene of the crime.
A 14-year-old boy is under arrest on suspicion of stabbing a 21-year-old during an argument in a Sliema apartment on Tuesday afternoon.
The alert was raised by a police patrol shortly after 4.30pm when they spotted the 21-year-old man bleeding heavily in the street. He was taken to hospital and was operated on.
The teen was arrested in the area of the apartment in Locker Street.
The police said early on Wednesday that both the 14 and 21-year-olds have been grievously injured.
A magisterial inquiry is being held and police investigations are continuing.