SINGAPORE, July 31 -- Parents and school authorities in Singapore are on high alert after a Primary 4 pupil from Fairfield Methodist School (Primary) was approached by two teenagers offering an e-vaporiser while walking home last week.

The incident took place on July 25 at a zebra crossing along Dover Rise.

The pupil refused the offer and left the scene unharmed, according to a report in The Straits Times.

Fairfield Methodist (Primary) principal Soh Mei Foong said the school has reported the matter to the authorities.

"Students were informed of the incident and reminded not to engage with strangers and to inform trusted adults should they be approached by any stranger or suspicious person," she said.

"As a precautionary measure, the ...