Surveillance video has captured the dramatic moment when police used a taser to subdue and detain an Afghan individual following a violent incident in Uxbridge, where a triple stabbing resulted in the death of a 49-year-old dog walker.

Authorities, including both police and paramedics, were dispatched to Midhurst Gardens in north London at approximately 5 PM on Monday after receiving reports of multiple attacks.

Despite receiving immediate medical attention at the scene, the dog walker succumbed to his injuries. Meanwhile, a 45-year-old man was left with injuries that will have a life-altering impact. A third victim, a 14-year-old boy, was also injured, though his condition was not considered life-threatening or life-changing.

The Metropolitan Police announced today that a 22-year-old Afghan man was apprehended at the site, suspected of both murder and attempted murder.

Local accounts suggest that the incident stemmed from an altercation involving the Afghan man, who was reportedly staying as a lodger at the residence of the 45-year-old victim, whose name has not been released.

The Afghan chased two victims out the house, eyewitnesses said, before the 49-year-old man – who was walking his dog at the time – tried to intervene and was slashed across the neck. 

Footage posted online today appears to show the suspect walking along a residential street, before two police officers sprint after him, one pointing a Taser and shouting ‘drop the knife’ and ‘get on the floor’.

Several others join them before the Taser is fired and the man falls to the ground. 

Footage shows the moment police tasered and arrested an Afghan national after a triple stabbing

Police at the scene after a 49-year-old dog walker died in a triple stabbing in Uxbridge

The attack is not being treated as terrorism, and detectives are working to establish any relationship between the suspect and the three victims, the Metropolitan Police said. 

There has been widespread shock within the local community following the brutal attack. One witness told the Daily Mail: ‘The Afghan man was chasing a man and a boy around the road and a local man who was with his dog tried to stop it.

‘There was blood everywhere and the paramedics were there for at least 30 minutes trying to save his life. It was absolute carnage and very distressing to see.’

Another local added: ‘The dead man is very well known around here. He’s a lovely guy, very gentle and peaceful. He was just trying to help and it’s ended up costing him his life.’

A witness said: ‘I saw a young man come running out of the house waving a large knife around. He had a mad look in his eyes and was screaming.’

One local claimed the Afghan had been living as a lodger for the past six months in the 45-year-old man’s house.

A woman who came to lay flowers near the police cordon on Midhurst Gardens said the incident made her feel ‘absolutely sick’.

A police tent could be seen at one end of the road with forensics working on the street earlier this afternoon. 

Four bunches of flowers were placed near the police cordon, while another was left by a female local from a neighbouring road. 

The woman, who wished to remain anonymous, said: ‘Last night the police came down my road, it was about 5pm, I thought to myself ”oh my god I wonder what’s happened”.

‘I just thought I’d come down and put some flowers down for the family.’

Officers remain at the scene of the stabbing after three people were attacked 

Police and ambulance crews were called to Midhurst Gardens at around 5pm on Monday where three people were stabbed

The scene in Midhurst Gardens after a man was stabbed to death and two other people were injured

A 49-year-old man was treated at the scene but died, while another man suffered life-changing injuries

Chief Superintendent Jill Horsfall said: ‘This was a shocking and senseless act of violence that has left one man dead and two others injured.

‘Our thoughts are with the victim’s family and friends at this unimaginably difficult time.

‘The incident will have understandably caused concern to the local community. I have deployed multiple officers to the local area, they will be here throughout the week to provide reassurance while detectives work intensely to piece together the circumstances.

‘I understand that there has been a lot of speculation online following on from this incident. We ask that you rely on us for information, and that you do not share sensitive footage.

‘If anyone saw or has any information about the incident, then please come forward to police. We appreciate any information that you may have. 

‘There will be a crime scene and a heavy police presence within the area over the next few days, I thank residents for their patience.’

Anyone with information can call police on 101 quoting the reference 5129/27OCT, or to remain anonymous contact Crimestoppers on 0800 555111 or online.