BANGKOK: Thailand protested an incident involving Myanmar’s navy firing on Thai fishing vessels, Prime Minister Paetongtarn Shinawatra said on Sunday, after one fisherman drowned, two were injured and dozens were detained from one of the boats.

Shinawatra questioned claims that the fishing boats had intruded into Myanmar’s territorial waters when Myanmar’s navy opened fire on the vessels on Saturday.

The Thai defense ministry earlier said two of 15 Thai fishing vessels were fired on when they were 4-5.7 nautical miles (7.4-10.6 km) inside Myanmar’s territorial waters near the southern Thai province of Ranong.

“It is inconclusive,“ Shinawatra said, when asked by reporters whether Thai fishing boats encroached on Myanmar’s territorial waters.

“We don’t support violence whatever the circumstances,“ she said, adding that Thailand was seeking more details on the incident and a quick release of four Thai nationals who were among the 31 fishermen detained.

Myanmar’s ruling junta did not immediately respond to a telephone request for comment.

Thai Defense Minister Phumtham Wechayachai said a letter protesting the use of force was sent to Myanmar through a local border mechanism, demanding clear details about what happened and a quick return of the Thai boat and crew detained.

Thai Foreign Minister Maris Sangiampongsa also issued a letter of concern over the incident to the Myanmar government and summoned the Myanmar ambassador for a meeting on Monday, seeking clarification about what happened and a quick release of the four Thai nationals.

Myanmar has been in crisis since 2021 when the military seized power, toppling an elected government and sparking an armed rebellion by crushing protests with lethal force.