Grangetown stabbing: Murder probe after man dies in Cardiff
A murder investigation has been launched after a 20-year-old man was stabbed to death.
Police were called to reports of a serious assault in a front garden at a house in Corporation Road, Grangetown, Cardiff, at about 02:00 BST on Monday.
The victim suffered multiple stab wounds and died at the scene. No arrests have been made.
Corporation Road and Holmesdale Street have reopened after being shut while forensics officers examined the scene.
Det Chf Insp Gareth Morgan, who is leading the investigation, said: "Detectives will be making inquiries in the Grangetown and Butetown areas of Cardiff today while we establish the exact circumstances of this fatal incident and who is responsible.
"A young man has been murdered and we would appeal for anyone with information to please contact South Wales Police."
Although the victim has yet to be formally identified, he is believed to be a 20-year-old man from Butetown. His next of kin have been informed.
At the scene: BBC Wales reporter Michela Riva
People in the area said they were shocked and surprised to hear about the attack on their doorstep.
Neighbours described the area as generally safe and a taxi driver, who lives near the police cordon, said he was upset to hear the young man was from Butetown as it could be someone he knows.
Community organiser Ali Abdi described the incident as "alarming" especially given it was at the start of the school summer holidays.
Analysis from Jenny Rees, BBC Wales home affairs correspondent
In the last year there's been a 25% rise in knife crime across Wales - with south Wales accounting for more than half of that.
In 2017-18 there were 1,129 knife-related incidents in Wales, with 630 in the South Wales Police force area, a 32% rise.
Compare that to 2010-11 and the contrast is greater - we've seen a 52% rise in these crimes across Wales.
But let's put that in context. We're still talking comparatively small numbers, especially compared to big cities in England.
It's an issue senior police are clearly aware of - during a recent Facebook Live session, the chief constable of South Wales Police, Matt Jukes, said officers have certainly seen an increase in people carrying knives.
His concern was the perception by young people that they need to carry knives - compared to the reality that it simply increases your risk of being a victim.