Luton Marsh Farm stabbing: Police open murder inquiry
A murder investigation has been opened after a 20-year-old was killed in what police say was a "targeted attack".
Armed police were called to the scene of the stabbing in Thrales Close, Marsh Farm, on Sunday night.
The man was found with serious injuries and died after he was taken to Luton and Dunstable Hospital.
Police, who are appealing for any witnesses to the stabbing to come forward, said the victim's family had been informed.
Police want to speak to three people seen on CCTV walking together around the Thrales Close and Purley Centre area.
They are two black men, one with a dog on a lead, the other riding a bicycle, and a young white woman, possibly a teenage girl, wearing shorts or a short skirt with dyed red hair in a ponytail.
Det Ch Insp Stephen Collin said: "It was a targeted attack. The early stages of this investigation suggest that the victim may well have known his attacker as there was no indication of a disturbance prior to the fatal assault.
"Marsh Farm is a very community-orientated area and I'm sure that local residents will be able to assist us with our inquiries."
A post-mortem examination is expected to take place on Tuesday.