SINGAPORE- A total of 3,520 sleeping pills were seized from a male Bangladesh national at Changi Airport on Thursday.

The sleeping pills, or Nitrazepam, were seized from him at about 12.30am at Terminal 1 when he was stopped by officers for routine checks upon arrival, said the Immigration & Checkpoints Authority (ICA) in a statement on Friday.

ICA officers retrieved the pills from a cardboard box after they searched the man's luggage.

The pills have been handed over to the Health Sciences Authority (HSA) and the 34-year-old is now being investigated by HSA.

The HSA reminded the public that it is an offence to import or sell substances listed in the Poisons Act without the necessary licenses.

Anyone found guilty of an offence under the Poisons Act can be fined up to $10,000 and/or jailed for up to two years if convicted.