The Northern Territory Police Force has arrested a man in relation to a death in Katherine overnight.
Around 6.45pm, police received a report that a 19-year-old man had been stabbed at an address in Holtze Crescent.
Police attended the scene but could not locate the victim. Patrols located a vehicle nearby which contained the 19-year-old who was suffering a serious stab wound to his upper body.
Police placed the victim into the rear of the police vehicle with two officers providing first aid. The man was conveyed to Katherine AUSMAT Field Hospital where he was declared deceased a short time later.
A second vehicle was located at the hospital with an 18-year-old male suffering from a stab wound to the upper body. He was transported by CareFlight to Darwin in a serious but stable condition.
The 19-year-old driver male of the second vehicle was arrested in relation to the incident and currently remains in custody.
It is believed the men are known to one another.
Multiple crime scenes have been declared and due to the deceased being in the care of police shortly before his death, the death will be investigated as a death in custody with oversight from the Professional Standard Command.
Police are urging anyone with information to make contact on 131 444, quote reference P26092527 or report anonymously through Crime Stoppers on 1800 333 000 or via crimestoppersnt.com.au.