This is the dramatic moment two men stab each other during an early-hours knife fight on the London Underground.
In the shocking footage captured inside Brixton tube station, Joseph Dunkley, 46, and 18-year-old Samuel Gbo engage in a brutal brawl in what is thought to be a case of mistaken identity.
The frightening incident occurred at about 5.30am on August 5 last year.
Dunkley was at Brixton Underground station when was approached by an unknown man, British Transport Police (BTP) said.
After a heated argument, a fight broke out and Dunkley lunged towards the other man, who then ran into the tube station.
Dunkley gave chase, heading towards a Victoria Line train.
At the same time, a group of males, including 18-year-old Samuel Gbo, entered the same station.
On a northbound service, it is believed Dunkley confused Gbo with the man he was chasing and became violent. CCTV captured the incident on the train, which turned violent after two knives were pulled.
Joseph Dunkley, 46 (pictured), has been jailed for eight years after he was caught on camera lunging a knife towards another man on the London Underground
During the journey towards Stockwell, Dunkley threatened the group of men with a knife and then stabbed Gbo.
The teenager, seen in the video wearing a white t-shirt, then produced a knife and stabbed Dunkley twice in the arm.
At Stockwell, the disorder spilled onto the platform where police and paramedics attended.
Investigating officer PC Neil Lane, from BTP, said: ‘Knife crime will never be tolerated on the London Underground network, and today’s sentence shows the consequence of knife crime.
‘The Tube network is rich with CCTV, and we use this vital evidence to identify offenders and bring them before the courts.
‘Those individuals who are intent on carrying knives should see this sentence as a deterrent to this reckless behaviour.’
Dunkley appeared at Southwark Crown Court on Friday and was jailed for eight years.
It is thought Dunkley had chased another unidentified man into the station then mistakenly attacked Gbo believing he was his target
He was previously found guilty of affray, violent disorder, unlawful malicious wounding and GBH with intent.
He has previously pleaded guilty to a charge of possession of an offensive weapon.
Gbo pleaded guilty to charges of violent disorder, possession of an offensive weapon and unlawful malicious wounding.
At Southwark Crown Court on March 16, he was handed a 16-month prison sentence, suspended for 24 months, and was also ordered to pay a £20 victim surcharge.