Two men have been arrested on suspicion of stabbing to death a schoolboy with a zombie knife in south-east London, police said.

The suspects, aged 52 and 18, are being questioned over the murder of 15-year-old Daejuan Campbell, who cried out “I’m 15, don’t let me die” as a local woman tried to save his life.

The Metropolitan Police said it was called at about 6.35pm on Sunday to Eglinton Road, Woolwich, where they found Daejuan with a stab injury.

Despite the efforts of officers and paramedics, he died at the scene a short time later, according to police.

A ban on owning zombie-style knives and machetes came into force on Tuesday, two days after the stabbing.

The ban is part of efforts to reduce knife crime, with campaigners including actor Idris Elba pushing for the large blades to be outlawed.

Detective Chief Superintendent Trevor Lawry said: “My thoughts are with Daejuan’s loved ones as they try and come to terms with this heart-breaking incident.”

He also urged any witnesses of Sunday’s attack, who may have seen someone running away from the area, or anyone with video footage to come forward.

Anyone with information has been asked to call police on 0208 721 4005 quoting Operation Baghaze.