According to some sources, the invasion resulted in four fatalities.
A bomb was thrown into an annual good in the Umphang region of northern Tak state late on Friday evening, killing at least three people and injuring results more. Two teenage Karens were later detained.
The assault occurred at the Red Cross Doi Loyfa good, said Pol Col Supakorn Phiphatphimpha, commander of Umphang officers. Around 11.30pm, the incident was reported to the authorities.
The bomb was thrown in front of a dancing floor where locals and visitors were chanting along. Folks fled for their own protection after the explosion. Some fell to the ground in front of the period, according to police.
The force of the explosion killed two individuals on the spot and injured 56 some, six significantly. After first support was provided by rescue workers, the wounded were rushed to Umphang Hospital.
Three people were reported in Thai internet, but some sources claimed four people died as a result of the invasion.
Manot Phoniam, commander of Umphang city, said the fair was held for seven times, from Dec 8 to Dec 14.  , Teams of community individuals, officers and men were arranged to beef up security during the occasion, said Mr Manot.  ,
The event featured several show stages, and the attack took place at the standard waltz level, he added.
Two Karen fresh men, 16 and 17, were detained late on Friday evening for questioning regarding their alleged role in the rocket assault, according to a cause close to the police. One of them confessed, while the other denied any involvement.