The incident reportedly occurred around 4:50 a.m. last Friday on Haad Rin beach, where the monthly all-night event took place. The victim told local police she could not clearly identify the suspects due to intoxication at the time of the assault, according to the Bangkok Post.
On Saturday, police arrested Vijay Dadasaheb, 47, and Rahul Balasaheb, 40.
Both men have been charged of colluding in rape, which carries a jail sentence of up to 20 years under Thai law.
Police chief Apichart Chansamret stated that Dadasaheb confessed to the crime, while Balasaheb denied rape allegations, claiming he had only hugged and kissed the woman.
Authorities have reportedly gathered evidence, including witness accounts, DNA samples, and CCTV footage that showed no suspects other than the two men at the scene, the Khaosod reported.
The Full Moon Party, originating in 1985 on Ko Pha-ngan, is known globally for attracting tourists who come for music, dancing, and festivities held each month during the full moon.