A 50-year-old Malaysian motorcyclist was caught with 1,169 packets of chewing tobacco at Woodlands Checkpoint on Thursday.
In a Facebook post, the Immigration and Checkpoints Authority (ICA) said the packets of chewing tobacco were found in the motorcycle carrier box, the rider's raincoat bag and haversack, and inside his shoes.
The man was stopped by ICA officers at the checkpoint at about 4.45am before the sachets were discovered.
ICA has referred the case to the Health Sciences Authority.
"Our borders are our first line of defence in safeguarding Singapore's security," the authority said.
"The ICA will continue to conduct security checks on passengers and vehicles at the checkpoints to prevent attempts to smuggle in undesirable persons, drugs, weapons, explosives and other contraband."
Choo Yun Ting
Correction note: This story has been edited to correct its headline.