A Midland man was stabbed to death in southern Thailand after reportedly making advances towards his attacker's girlfriend.
Richard Mark Collins, aged 35, from the Whitecross area of Hereford, was killed on Tuesday night in the tourist town of Krabi.
West Mercia Police in his home town said Mr Collins was a qualified diving instructor and had been working seasonally in Thailand for several years in between trips back to Britain.
His family are keeping in close contact with the Foreign Office and are said to be "reeling" at the tragedy.
They are being supported by police liaison officers.
Thai police Lieutenant Colonel Jakra Sawakol said Mr Collins was stabbed twice and rushed to a hospital where he later died.
Uthen Duangoi, a 29-year-old taxi driver was arrested. Lt Col Jakra said Uthen stabbed Mr Collins out of anger after the victim made sexual advances towards his girlfriend.
Mr Collins's girlfriend, Panida Meedi, aged 24, said he had been working for four years for Thai Heritage, one of several companies building a new international airport on the outskirts of Bangkok.
The pair lived in Bangkok but visited Krabi periodically and were friends with Uthen and his girlfriend, she said.
"Richard went to their house, and I was informed that he was stabbed," Panida said.
"I don't know how it happened."