Tourist police chief Pol Lt Gen Saksira Phuak-um said in a statement on the Tourist Police's official Facebook page that security in key tourist zones would be strengthened to restore international visitors' confidence.
The attack, which took place in Bangkok's Ratchadamri area around 10 p.m. on Aug. 7, has sparked concerns within the Thai tourism industry about the country's safety image.
Sisdivachr Cheewarattanaporn, honorary president and senior advisor to the Association of Thai Travel Agents (ATTA), described the incident as "serious and deeply disturbing," according to Nation Thailand.
He said it impacts tourists' perceptions of Thailand, tarnishing its image internationally, particularly among ASEAN nations that place strong emphasis on security.
Sisdivachr urged the government to urgently improve tangible safety infrastructure for tourists and to communicate these measures clearly through official foreign-language channels to reassure both travelers and foreign governments.
According to police, the assault happened when the victims, 26-year-old Ong Yik Leong and 27-year-old Gan Xiao Zhen, were sitting on the steps of a shopping mall. The attacker allegedly approached them from behind, poured paint thinner over them from a plastic bottle, and ignited it. The pair attempted to flee but were chased down and set alight.
The Thai government has announced it will provide up to 550,000 baht (US$17,000) in compensation to each victim.
The incident comes at a time when Thailand is grappling with declining tourist arrivals this year, in part due to safety concerns.
Thailand, the second largest economy in Southeast Asia, recorded over 19 million foreign arrivals in the first seven months of this year, down over 6% year-on-year.