A bodybuilder is accused of stabbing a man to death and seriously injuring a woman in a rented flat.
The suspect, named locally as Duje E., is under police guard in hospital after the alleged knife attack.
The 24-year-old bodybuilder is accused of stabbing the man, 28, to death and causing life-threatening injuries to the 22-year-old woman.
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Duje was arrested about 20 minutes later and has not yet been formally interviewed.
Prosecutors are treating the case as murder and attempted murder.
The attack happened overnight from Monday to Tuesday in a rented apartment in Šibenik, Croatia, after emergency medics called police at about 2.30am.
Local police said: “On arriving at the scene, it was established that a 28-year-old man had died from stab wounds, while the injured 22-year-old woman was taken by ambulance to the General Hospital in Šibenik and her life was in danger.”
They added that a rapid search found the suspect in the city and that inquiries showed he had been in the flat with the victims.
The county prosecutor said there was suspicion that the 24-year-old Croatian, born in 2002, attacked a 28-year-old man, born in 1998, with a sharp object, and that the man died at the scene.
Prosecutors said he then attacked a 22-year-old woman, born in 2004, causing injuries that put her life in danger.
Officers found wrecked furniture and said they could barely get into the flat because belongings had been ripped up and thrown around.
Local reports said the suspect fled to his home and was found so heavily under the influence of drugs that police could not question him on Tuesday.
The woman was operated on and later described as stable in intensive care, as reported by Need To Know.
Investigators believe those in the flat had been taking drugs before a row broke out, and a large quantity of narcotics was recovered.
Police confirmed they had dealt with him before over theft and drug offences, including a spell in custody last year over an alleged dark-web drug order.
According to reports, the dead man, who came from Biograd, and the injured woman were a couple staying in a flat she had rented.
Prosecutors said they are still working to establish all the circumstances behind the alleged attack.
A gym-focused Instagram account circulating locally appears under the name Duje Ercegović. Police have not confirmed that surname.
No motive has been confirmed as the police probe continues.
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