Shocking footage has emerged showing a policeman viciously punching a suspect 26 times as he resists arrest and tries to swallow bags of cocaine.

The clip shows one female and two male officers restraining boxer Adam Salman, 27, on the ground in a residential area in Morden, south London.

Footage from the incident in June was uploaded to YouTube on Tuesday with the caption 'Police officer loses his temper' and has since received more than 2,000 views.

Salman was found to be in possession of cocaine and was violently resisting detention at the time.

A Met Police spokesman said no complaint was made about the officer by Salman, but his conduct had been investigated and deemed appropriate.

The police officer throws a barrage of punches at the suspect being restrained on the ground

The video begins with three officers on top of Salman, who was trying to swallow the cocaine bags at the time.

Salman can be seen bucking his body and kicking his legs as the officers struggle to keep him on the ground.

Suddenly, one officer begins rapidly punching him 26 times with considerable force in the back.

Salman was convicted of possession of cocaine and three counts of resisting and obstructing a police constable following the incident.

He was sentenced at South West London Magistrates Court to six weeks in prison .

A spokesperson for Metropolitan Police said: 'Salman ran from police and was seen attempting to conceal an item.

Salman, right, was convicted of possession of cocaine and three counts of resisting and obstructing a police officer

'Following a short foot chase, he was stopped and officers attempted to detain him.

'As he violently resisted arrest, officers witnessed him attempt to swallow bags of white powder, which following examination, was found to be cocaine.

'He was arrested and taken to a south London police station before being released under investigation. He was charged the following month.'

With regard to the officer's conduct, the spokesman added: 'After the footage was brought to the attention of the Metropolitan Police on 5 November, the matter was referred to the Directorate of Professional Standards and deemed appropriate for a borough level investigation by the local Professional Standards Unit.

'Enquiries continue. The officers shown in the footage have been identified. At this time, there are no restrictions.

The horrifying clip begins with three officers on top of the unidentified man that they are restraining

'No complaint has been received from the person who was arrested.'

Similar footage from the same month also emerged showing police officers punching a man in the face as he was pinned down by three officers.

The uniformed officers, from Avon and Somerset Police, pinned the man to the ground as he lay on his back in Yeovil, Somerset.

In the footage the police leaned on the man's chest as they appeared to be handcuffing him and then punch him directly in the face.

And in July 2016 police officers in Leicester were filmed punching and pepper spraying a suspect.

Three officers wrestled the man, punching him in the back and torso, as they wrestled him to the ground in front of stunned shoppers.