A Canadian man and his Thai wife were stabbed to death by a neighbour in Khon Kaen on Friday.
Police said the incident happened at about half past midnight in Moo 10 village in tambon Ban Thum.
Police found Michael Nixon, 54, and his Thai wife Anurak, 47, lying dead in front of their house. Kachornsak Panyadee, 36, a roti sai mai (cotton candy roti) vendor and the tenant of the neighbouring house, surrendered to the police and admitted to stabbing the couple to death with a foot-long knife.
The Canadian man sustained three stab wounds in the chest and abdomen, while his wife was stabbed in the abdomen.
Police said that Mr Kachornsak and the couple had frequently argued over parking. Mr Kachornsak said the front of his house had frequently been blocked by motorcycles and cars of people who visited the couple at night.
On Thursday night, the same parking issue arose when the couple received several guests. Mr Kachornsak waited until after midnight when the guests left. He walked to the couple's house, knocked on the door, and when the wife answered, he stabbed her. When the Canadian man rushed to help his wife, he was stabbed three times.
