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At least two people were injured, with a local government office building, a convenience store and a stolen vehicle among targets set on fire.
The incidents took place across the country's southern border provinces between 20:00 local time (13:00 GMT) and midnight on Saturday, the military's Internal Security Operations Command said in a statement.No group has claimed responsibility for the arson attacks.
Most were reported in Narathiwat province, with others occurring in neighbouring Yala and Pattani.Two women were injured when a bomb exploded in Muang district in Narathiwat province, according to the Bangkok Post.
Telecommunication towers were set on fire in several locations, with security officials warning residents against touching suspicious objects.Authorities imposed an overnight curfew in the Narathiwat province that was lifted on Sunday morning. No further attacks were reported on Sunday.
Charred vehicles pictured outside an administrative office in Narathiwat
Since 2004, a low-level conflict has simmered in the southernmost provinces of Buddhist-majority Thailand, as rebels in the Muslim-majority region battle for greater autonomy. More than 7,000 people have been killed in the violence so far.
The insurgency is mainly led by the Barisan Revolusi Nasional. Since talks facilitated by Malaysia began in 2013, the peace process has repeatedly stalled amid changing governments in Bangkok, with internal divisions on both sides.
In July, five soldiers were killed in a gun and bomb attack at a checkpoint in Narathiwat, prompting the authorities to postpone a planned dialogue process.Thai media report insurgents often target security officials and government buildings, sometimes ahead of visits by officials to the region.
Thai Prime Minister Anutin Charnvirakul and members of his cabinet are scheduled to make a two-day visit to the city of Hat Yai in southern Songkhla province next week to discuss investment projects, flooding prevention and security issues.