The DNA was discovered on Fang's thigh and underwear and a thorough examination of samples, submitted to a lab in Madrid, revealed that the DNA belonged to two men.
The officers from Ang Mo Kio Police Division established the identities of the men with the help of follow-up investigations and the images from police cameras.
The man's possible drug offenses and customs violations have been reported by police to Singapore Customs and the Central Narcotics Bureau, respectively.
Singapore will collaborate with its international counterparts to create global norms and an inclusive, open, and rules-based system that governs space operations.