Fatal stabbings are taking place every three days in London amid fears of the resurgence of “postcode wars” between rival gangs.

A total of 29 people have been killed using knives so far in 2018, which started with the murder of four young men during New Year’s Eve celebrations.

If the bloodshed continues at the same rate, more than 121 people will be stabbed to death in the capital by the end of the year, a dramatic 50 per cent increase on 2017.

Teenagers as young as 17 are among the victims, while many more have been severely injured in a spate of violence that has sparked large-scale police operations and urgent policy changes.

Yet another man lost his life on Thursday night after being stabbed in the neck near Plumstead railway station in south-east London.

The 23-year-old was able to call a friend for help and was driven to hospital, but later died from his injuries, and police do not yet know why he was attacked.

Fears are mounting over the resurgence of the so-called “postcode wars” that claimed dozens of lives in the past decade.

They saw territorial divisions between rival gangs brutally enforced across the capital, with victims unknowingly crossing invisible borders between postcodes or even smaller areas of specific streets or housing estates.

Met Police Chief: Police will use stop-and-search powers "properly" over knife crime

Patrick Green, CEO of anti-knife crime charity the Ben Kinsella Trust, fears the death toll “will get worse before it gets better”.

“There is no sign of these murders finishing,” he said. “Some of them are linked to postcode wars or gangs, some of them are unprovoked.

“There isn’t just one thing going on, which makes it really difficult coming up with a strategy to address it.”

Mr Green warned that police operations can only contain knife crime in one area or displace it elsewhere.

“It comes down to one simple thing, we’ve got to stop young people carrying knives in the first place,” he added.

All murders this year remain under investigation and have not yet reached trial, but witness reports suggest the area some victims came from was a motive for attacks.

An 18-year-old man was stabbed in Woodford, north-east London, by a gang who demanded to know where he and a friend were from on 15 March.

They were waiting to be picked up by his father after playing football nearby when the attackers approached, stabbing the victim in the stomach after he said he lived in nearby Chigwell.

Witness Andrew Hollands found him lying in the road seconds later and gave him emergency first aid.

“Looking in my eyes, he asked me: ‘Am I going to die?’” he said. The teenager is understood to have undergone surgery for internal injuries.

The teenagers murdered in London in 2018 Show all 21 1 /21 The teenagers murdered in London in 2018 The teenagers murdered in London in 2018 Oluwadamilolda Odeyingbo Oluwadamilolda Odeyingbo, 18, was killed in a fight in Chislehurst on 10 January 2018 Metropolitan Police The teenagers murdered in London in 2018 Hasan Ozcan Hasan Ozcan, 19, was stabbed to death on the Gascoigne Estate in Barking on 3 February 2018 Metropolitan Police The teenagers murdered in London in 2018 Sabri Chibani Sabri Chibani, 19, was stabbed fatally in the chest in Streatham on 11 February 2018 Metropolitan Police The teenagers murdered in London in 2018 Promise Nkenda Lord Promise Nkenda, 17, was stabbed to death in Canning Town on 14 February 2018 Facebook The teenagers murdered in London in 2018 Lewis Blackman Lewis Blackman, a 19-year-old rapper from Kentish Town, was stabbed to death in Kensington on 18 February 2018 Metropolitan Police The teenagers murdered in London in 2018 Abdikarim Hassan Abdikarim Hassan, 17, was stabbed to death near his home in Camden's Peckwater estate on 20 March - less tahan two hours before another man was stabbed to death nearby Metropolitan Police The teenagers murdered in London in 2018 Kelvin Odunuyi Kelvin Odunuyi, a 19-year-old rapper known as DipDat and Lampz, was shot dead in Wood Green on 8 March Metropolitan Police The teenagers murdered in London in 2018 Lyndon Davis Lyndon Davis, 18, was chased down and stabbed to death in Chadwell Heath on 14 March Metropolitan Police The teenagers murdered in London in 2018 Tanesha Melbourne-Blake Tanesha Melbourne, 17, was killed in a drive-by shooting in Tottenham on 2 April PA The teenagers murdered in London in 2018 Amaan Shakoor Amaan Shakoor, 16, was shot dead in Walthamstow on 2 April Metropolitan Police The teenagers murdered in London in 2018 Israel Ogunsola Israel Ogunsola, 18, was stabbed to death in Hackney on 4 April Metropolitan Police The teenagers murdered in London in 2018 Rhyhiem Ainsworth Barton Rhyhiem Ainsworth Barton, a 17-year-old rapper and aspiring architect, was shot dead in a Kennington Street on 5 May Handout The teenagers murdered in London in 2018 Jordan Douherty Aspiring rapper Jordan Douherty died of his injuries outside a birthday party in Romford on 23 June Metropolitan Police The teenagers murdered in London in 2018 Katrina Makunova Katrina Makunova, 17, was stabbed to death in Camberwell on 12 July 2018 Metropolitan Police The teenagers murdered in London in 2018 Latwaan Griffiths 18-year-old Latwaan Griffiths was fatally stabbed on 25 July and died in hospital after being thrown off the back of a moped in Camberwell Metropolitan Police The teenagers murdered in London in 2018 Guled Farah Guled Farah, 19, was shot in Walthamstow on 22 September Metropolitan Police The teenagers murdered in London in 2018 Ethan Nedd-Bruce Ethan Nedd-Bruce, 18, died after he was shot outside a party at a flat in Greenwich, south-east London, on 22 October. He had also been stabbed, but the gunshot wound was the cause of death. Metropolitan Police The teenagers murdered in London in 2018 Jay Hughes Jay Hughes, 15, died was fatally stabbed outside a chicken shop in Bellingham, south-east London, on 1 November Metropolitan Police The teenagers murdered in London in 2018 Malcolm Mide-Madariola Malcolm Mide-Madariola, 17, was found suffering from a stab wound outside Clapham South Tube station on 2 November Metropolitan Police The teenagers murdered in London in 2018 John Ogunjobi John Ogunjobi, 16, died in front of his parents after he was stabbed in Greenleaf Close, Tulse Hill, on 5 November Metropolitan Police The teenagers murdered in London in 2018 Aron Warren Aron Warren, 18, was found stabbed in a flat block in Greenwich on 8 December and died at the scene Metropolitan Police

Friends and relatives said he has no links to gangs, with his football academy describing a “very bright young man with great attitude and a top player”.

Weeks earlier, rapper Kelvin Odunuyi, 19, was shot dead by a masked man on a moped as he stood with friends outside a cinema in Wood Green.

“We now live in Harrow and I told him not to go back to Wood Green to see friends,” said his mother, Afishetu Oniru. “But he did and now he is dead after being shot dead in a random attack.”

Mr Odunuyi was not believed to be part of a gang himself but associated with members of groups locked in an escalating war in Wood Green and Tottenham.

Both areas lie in the borough of Haringey, where almost 100 police officers flooded the streets last week in an effort to damp down violence.

Dogs joined patrols on foot and in cars, vans, bikes and people carriers in an “attempt to prevent crime and actively target criminality by providing a highly visible police presence”.

Eight people were arrested for offences including possession of knives and a known gang member was caught to be returned to prison, but locals are worried that violence will return as police retreat.

Mr Green said he had met young men who did not leave Tottenham until their early twenties, not even to travel to other parts of London, because they were afraid.

“Postcode wars have already been there, it’s just the level of violence that has been applied now that’s striking,” he added.

London’s Air Ambulance is now being called to more stabbings and shootings than road accidents for the first time in its history, with “penetrating trauma” overtaking car and bike crashes as the most common cause for the helicopter to be dispatched.

Police at the scene in Enfield, north London, where a man died after being found shot and stabbed in the street on 17 March (PA)

Dr Gareth Grier, the lead clinician with London’s Air Ambulance, said it was no longer unusual for teams to perform open chest surgery for stab wounds twice in a single day.

“This would have been unheard of a few years back,” he added.

The Metropolitan Police commissioner, Cressida Dick, said last year that London’s crimewave was being driven by a “core group of young offenders” repeatedly committing assault and robbery “with relative impunity” and questioned whether tougher prison sentences could deter them.

Knife crime has risen by 21 per cent across England and Wales to a six-year high, with almost 37,000 offences recorded by police in the 12 months to September.

The statistic was revealed on the same day the number of police officers hit a record low, with the Police Federation accusing the Conservatives of “losing control in the fight against crime”.

Forces have been announcing swingeing cut-backs as the government continues to refuse blanket funding increases, seeing the Metropolitan Police close many police stations and merge its 32 policing boroughs into 12 command units to save £325m.

Stop and search is being increased and laws have been introduced aiming to crackdown on knife possession but police have been appealing for help to tackle the “underlying issues” driving the deadly trend.

This week the Home Office launched an advertising campaign calling on young people to go “knife free” with videos launched across Snapchat, Twitter, Spotify and other online platforms.

The Ministry of Justice has devolved some powers to the mayor of London, Sadiq Khan, to draw up bespoke policies for the capital including a “secure school” for young offenders, overhauling failing probation services and tackling the “root causes” of crime.

Mr Green said that when the violent crime rate was falling between 2011 and 2014, significant government funding had been injected into prevention work but many of the initiatives expired after a three-year cycle.