If it turns out insurgents were responsible for last week's bombings, it would mark a dangerous new expansion of the low-level war that has plagued the mostly Buddhist country's southern border region with Malaysia.
It could also prove a dangerous incentive to carry out more violence.
With few exceptions, the militants have so far avoided attacking known tourist destinations because "they didn't want to be seen as a terrorist group," Rungrawee said. "But that could change if attacks like this prove effective" by attracting more attention to the war or pushing the government to make concessions at peace talks, she said.
While there has been no claim of responsibility and authorities have yet to blame any specific group, police investigators and analysts say the latest violence bears striking similarities to the methods used by the separatist militants who have traditionally limited operations to the Muslim-dominated provinces of Yala, Pattani and Narathiwat.
The attacks Thursday and Friday took place in seven locations south of Bangkok, including the island of Phuket. The bombs were small and appeared designed to shock rather than induce mass casualties, and left no immediate major impact on Thailand's lucrative tourist industry.
Asked Monday about the possibility that insurgents orchestrated the latest violence, police commissioner Chakthip Chaijinda reiterated words spoken by other top officials over the weekend, saying "there are similarities in bomb-making methods and the equipment."
Authorities say some of the homemade bombs were triggered remotely by cellphones — a tactic used by insurgents. Some of the phones, recovered by police, were reportedly purchased in Malaysia, into which Thai militants are known to cross with ease.
Malaysian police chief Khalif Abu Bakar confirmed Thai authorities have reached out, and officials on his side of the border were searching for those who purchased and sold the phones.
What had been decades of scattered acts of violence by separatists escalated sharply in January 2004, when militants raided an army depot, killed four soldiers and made off with hundreds of weapons. By April, the insurgents were launching coordinated attacks across the three southernmost provinces, and more than 100 people were killed when one group staged a showdown in a mosque to which they had retreated.
A heavy-handed response by government forces resulted in seven Thai Muslims being killed in October during an anti-government protest in Tak Bai in Narathiwat province, and 78 others died of asphyxiation when they were piled tightly into trucks after being arrested.
Muslims in the south say they don't feel like full members of Thailand's majority Buddhist society and complain of discrimination, rights abuses and arbitrary detention. The provinces in the south once belonged to a Malay sultanate which Thailand annexed in 1902.
The insurgents are split into several factions, the strongest of which is the Patani-Malay National Revolutionary Front, or BRN. The groups' leadership, organizational structure and membership are secretive, so much so that Rungrawee said some recruits who have taken part in attacks were not even aware of which faction they belonged to.
The government of former Prime Minister Yingluck Shinawatra began peace talks with separatists in 2013, although there was some doubt about whether the leaders attending fully represented insurgents on the ground. Yingluck's government was toppled in a coup a year later, and the junta that rules Thailand has continued the effort.
Talks, however, have gotten bogged down in such basic parameters