Thai police say a bomb exploded at a stadium in the southern province of Narathiwat during a ceremony attended by high ranking officials, injuring six people.
However, Narathiwat governor Pracha Taerat was not hurt in Thursday's blast.
Late Wednesday in the same province a villager was killed by a bomb that exploded in a food stall shortly after rebels exchanged gunfire with police.
In a separate incident Wednesday officials say arsonists destroyed a school building.
Thai Prime Minister Thaksin Shinawatra has promised to continue his tough policy against a separatist rebellion in Thailand's three southern provinces.
His pledge came after the general election a week ago, which saw his party win a landslide victory, despite failing to win a single seat in the south.