SINGAPOREbingosupplies, July 4 (Xinhua) -- Singapore's Health Sciences Authority (HSA) seized over 350,000 e-cigarettes and components worth more than 6 million Singapore dollars (4.4 million U.S. dollars) in operations from June 14 to June 18, it said Thursday.

Two men and two women are assisting with investigations.

HSA noted that it had seized e-cigarettes and components worth over 18 million Singapore dollars this year.

It is illegal to import, distribute, or sell e-cigarettes and their components in Singapore.■