And according to the authorities, the cases were in Hua Hin. As stated below:
"Prachuap Khiri Khan department of public health issued a notice for people to go to Hua Hin Hospital or the nearest hospital to them urgently if they had been at a pub or a shop in the city between certain times in the last week.
The venues and times are:
Maya Pub, Hua Hin, 30th March 10.30pm to 2 am
Ting Kowlee (Korean) shop, Hua Hin, 1st April 6-7pm.
The notice came as Prachuap registered two new cases of coronavirus on Monday, the first new cases in the province for several weeks."
Edit: Sorry, I see this was already posted elsewhere.