From Thai PBS World

A Briton was killed and his compatriot was seriously injured after a Thai man attacked them with a sickle-shaped long knife in front of a house in Muang district of the western province of Kanchanaburi early Saturday morning.

Thai police identified the deceased as 49-year old John Marcus and the survivor as Sean Kewin, 55.

Police said that the two Britons were drinking at a table in front of their house, while music playing on a radio, when the assailant attacked them.

Both were rushed to the nearest hospital, but Marcus died from a wound to his neck, while Kewin was admitted for emergency treatment.

Police suspect that the assailant could be a resident of the same neighbourhood, who reportedly has a history of mental treatment and who exhibited recent injuries, possible suffered during the fight with the two Britons.

At the time of this report, police were still looking for the perpetrator.

https://www.thaipbsworld.com/briton-killed-and-another-seriously-injured-in-knife-attack-in-kanchanaburi/

From The Thaiger

Attacker arrested in stabbing

Police in the western province of Kanchanaburi now believe that a man they took into custody is responsible for a brutal knife attack on two British men that resulted in one of their deaths. Yesterday morning at 8:49 am, police found and apprehended a 23-year old Thai man that many suspected was the assailant in the stabbing.

New reporting revealed that Prasut Thipthep was arrested very nearby the crimes he’s alleged to have committed when police found him just across the street from the house that had been rented by the British men who were attacked. He was said to be hiding in a room that belonged to a relative.

It was reported that the attacker has a history of mental health issues, with hospital records for previous problems. After the crime was committed, angry residents, believing he was responsible for the grisly murder, attacked and beat the suspect enough that he had to be sent to the hospital for treatment.

Sufficient evidence was left behind at the scene of the crime including the sickle-shaped knife used in the stabbing and a pair of slippers shoes believed to be owned by the attacker. The man remains in police custody and will be held at the Muang District Police Station for further investigation. He’s been charged with murder and attempted murder for the incident.

According to police, the two British men were playing loud music on a radio in front of their house after 3 am as they sat at a table drinking beers. They were surprised by a Thai man with a long sickle-shaped knife confronting them and attacking them. It is thought that the attack may have been provoked because the Thai man was upset by the loud music late at night

55 year old Shaun Kevin Dagnan (previously reported as Sean Kewin) suffered serious wounds from stabbing when was admitted for emergency treatment in the nearest hospital. New Reports say that while his life is no longer in danger, she is still being treated closely at Paholpolpayuhasena Hospital for his wounds.

But 49 year old John Marcus was found face down in a pool of blood near his chair in front of the house with a stabbing to his neck that, despite the hospital’s best efforts, resulted in his death.

https://thethaiger.com/hot-news/crime/attacker-arrested-in-stabbing-of-2-british-men-in-kanchanaburi

5 hours ago, reader said:

According to police, the two British men were playing loud music on a radio in front of their house after 3 am as they sat at a table drinking beers. They were surprised by a Thai man with a long sickle-shaped knife confronting them and attacking them. It is thought that the attack may have been provoked because the Thai man was upset by the loud music late at night

 

3 a.m and loud music outside ?!!!  What they expected , loud applause from neighbors? Not a hanging offence but certainly warranting good beatings if true

9 hours ago, vinapu said:

3 a.m and loud music outside ?!!! 

Had someone been playing loud music outside my home at that hour, I would not have left those Brits alone. I would probably have gone out and asked them to turn it down. If they refused, I might have smashed it and left a couple of thousand baht for them to buy a replacement with a smaller loudspeaker! No one deserves to be murdered for such a minor issue, but I am certain that even a complaint to the cops would have resulted at best in a "so what?"

In the UK, you can call the noise abatement people at the local council and they sort it. 

Thailand doesn't seem to care about noise.  Hence unsilenced motorcycles, pick ups with loudspeaker advertising and bars playing loud music outside. 

7 hours ago, z909 said:

In the UK, you can call the noise abatement people at the local council and they sort it. 

Thailand doesn't seem to care about noise.  Hence unsilenced motorcycles, pick ups with loudspeaker advertising and bars playing loud music outside. 

it's why they use such non-standard methods to keep nights quiet

What makes this even more tragic is the fact that several news sources report that the parties had previously had a cordial relationship, even drinking and joking together on earlier occasions. The extreme violent reaction may have been fueled by a combination of alcohol and mental illness.

It brings to mind similar reactions in road rage incidents and even domestic arguments. If there's a lesson here, it's that deescalation may not only be the reasonable course of action, it may be the one that saves your life.