SINGAPORE - With the festive season soon upon us, police have reminded the public to stay vigilant as they go shopping, as large crowds are expected.

Some tips they gave in an advisory on Wednesday include: be wary of suspicious persons, avoid exposing cash and valuables in public, or placing wallets in back pockets.

Retailers should also take note of thieves and keep expensive merchandise in locked display cabinets as well as install surveillance cameras in their shops.

Given the large crowds in shopping malls and other public areas, the public, especially ladies, are advised to stay alert and to avoid taking short-cuts through dark and deserted places to minimise the chances of being molested.

Police also advised those going for a vacation to install a burglar alarm system and to ensure that main doors and windows are properly secured with strong grilles and good quality locks.

While some people may set off sparklers for the festivities, police have warned that setting off improvised explosive sparklers is illegal, as these devices - including sparklers bundled together - are potential fire hazards and can cause noise pollution.

Anyone caught setting off improvised explosive devices may be convicted of negligent conduct with respect to any fire or combustible matter, or negligent conduct with respect to any explosive substance. If convicted of either offence, the offender faces up to a year in jail and a fine of up to $5,000.