Two teenagers who boasted online about stabbing a 15-year-old in an “unprovoked attack” have been jailed for 19 years.

Abdurauf Saheb, 18, of Grenfell Road, Mitcham and a 15-year-old from Wandsworth were found guilty of wounding with intent to cause grievous bodily harm on Thursday, April 13.

Saheb was sentenced to 14 years imprisonment at Kingston Crown Court.

The other defendant, a 15-year-old boy, was sentenced to five years in jail.

At about 8.40pm on September 3, 2016, the 15-year-old victim was outside the Sainsbury's supermarket on Garratt Lane when he was approached by two teenagers on bicycles.

The suspects started talking to him before stabbing him in the stomach in an unprovoked attack.

Police were called to the scene, and with the help of an off-duty fire fighter, provided life-saving first aid until the London Ambulance Service arrived.

The victim was taken to hospital where he was treated for his injuries.

Officers discovered that the two suspects had bragged about their involvement and were able to find online videos relating to the offence.

Saheb and the 15-year-old were then arrested and charged. They were both sentenced on Friday, September 8.

Detective Constable Lee-Ann Doubell, from Wandsworth Borough, said: "The victim was left seriously injured by the ferocity of this unprovoked attack. The first aid provided by those who were first on scene proved invaluable in helping him.

"It is hard to find any reason why Saheb and his accomplice would choose to act so violently. Today's sentencing will give them a long time to reflect upon their actions.

"I would urge anyone with information regarding knife crime to contact police or Crimestoppers."

The mother of the victim also released the following statement: "We are very happy with the outcome of the trial. As a family we encourage any victim of crime to work with the police. The results do come in the end. Being patient is key."

The Metropolitan Police Service is currently engaged in Operation Sceptre, the latest crackdown on knife crime, focusing on schools and habitual knife carriers.

If you have information about anyone carrying or using knives please contact your local police via 101 or call Crimestoppers anonymously on 0800 555 111.