Info 23: Gas Leak in Your Home

What you should do, if you detect gas leak in your house immediately:
Evacuate all the occupants from your home / building. Contact your nearest Gas Malaysia Sdn Bhd office, away from the affected premise or call our 24 hour emergency toll-free number at 1-800-88-9119. Turn off the gas at the meter stop valve, if you can. Once the gas has been shut off, contact us or a qualified gas contractor. If possible, get electrical power to the affected premise cut off at a place well clear of any gas- filled atmosphere. What you should not do when you smell gas in your house: Do not ignite Do not turn on or off electrical switches Do not smoke

source: here