A 16-year-old boy has been arrested on suspicion of murdering a young father who died after being stabbed in the neck during a street row.
It is understood Mike Grimshaw, 34, was stabbed when he intervened in a disturbance outside his house in Sale, Greater Manchester.
He was treated at the scene in Royton Avenue at around 23:10 BST on Thursday.
Mr Grimshaw had been due to get married in a few weeks' time, according to neighbours.
Det Ch Insp Estelle Mathieson, of Greater Manchester Police's Major Incident Team, said: "This has been a fast-moving inquiry and we have one teenager in custody but our investigation continues.
"We have had a fantastic response from the public that has provided a number of positive lines of inquiry but we still need the community's help to find the men responsible for taking the life of this young man and leaving his child to grow up without a dad.
"Only a few hours have passed since this tragic turn of events occurred. Our thoughts are with his family at this difficult time."