The Health Sciences Authority (HSA) raided the home of a man who was caught on camera vaping on the MRT train, said the agency in a news release on May 13.
A video of the man using an e-vaporiser was posted online by Sgfollowsall on April 18.
HSA identified the 36-year-old man and raided his home. No e-vaporiser was found.
The man claimed that he had thrown away his vape.
Investigations are ongoing.
The purchase, possession and use of e-vaporisers are prohibited in Singapore under the Tobacco (Control of Advertisements and Sale) Act.
Offenders can be fined up to $2,000.