Arrest and confiscations come amid spike in clashes between police and smugglers in the kingdom's remote northern hinterlands, long a hub for the trade in illegal narcotics.
Thai police have said one person managed to survive the accident and 11 others were trapped in the vehicle and died in the blaze.
Around the world, people ushered in the Lunar New Year, the most important annual holiday for Chinese people.
The shoot-out takes place in Thailand's southernmost province where rebels in the Muslim-majority region are battling for greater autonomy from the state.
Thailand's Prime Minister Prayuth Chan-ocha has formally joined the new United Thai Nation Party in a bid to continue his work running the country.
Around 400 individuals, including foreign nationals, were believed to be working at the Grand Diamond City casino-hotel in Poipet at the time of the blaze.
The incident occurred while the warship was on patrol at sea 32 kilometres from the pier at Bangsaphan district in Prachuap Khiri Khan province.
A brief firefight near the northern side of the Myanmar border, the route often used by drug smugglers, left 15 suspected drug dealers dead.
Dismissal of four monks in central Phetchabun province highlights problem of drug use in Thailand, a major transit country for meth flooding in from Myanmar.
Almost 30 people, including police officers and civilians, were hurt and police say the number could increase.
Japanese Prime Minister Fumio Kishida says North Korea has "repeated its provocations with unprecedented frequency", while the White House says it will coordinate with regional leaders on the missile test.
Xi Jinping made the remarks in a written speech for the Asia-Pacific Economic Cooperation forum, meeting in Bangkok, Thailand on Friday and Saturday.
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