Toxic gas (CO?) leak - deaths due to suffocation

http://www.pakistantoday.com.pk/2012/01/4-die-in-gas-leak/: 4 people die and one become unconscious in the generator room in which they slept after forgetting to switchoff the generator before sleep. Though, it is stated as suffocation, the fact that they died in the sleep indicates deadly carbon monoxide release in the room and that the exhaust of the generator is within the room instead of letting out of the room. Carbon monoxide, an odorless gas can lead to asphyxiation and the exposed do not realize that they are inhaling this toxic gas. This clearly indicates wrong design of exhaust system. Otherwise, the exhaust system must have been developed leaks inside the room. 
Had it been suffocation, they would have got up from the sleep and tried to come out of the room. Being winter, they would have felt comfortable in the warm room before sleep and subsequently died in the sleep.

In another similar incident, http://www.pakistantoday.com.pk/2012/01/toxic-gas-suffocates-family-kills-three-children/, three children die and another three children become unconscious, when they slept in the room that was kept warm by coal burning in a pot. This is also because of carbon monoxide poisoning.

Incidents like the above happen regularly at different parts of the world. Few years ago, following incidents were reported, which are all due to carbon monoxide poisoning.

• Inmates of a car died when switched on air conditioner and slept. Carbon monoxide buildup inside the car due to recirculation of air was stated as the reason.
• Car inmates died due to carbon monoxide buildup, after they closed all windows and stayed inside because of heavy rain outside and flood waters caused traffic jam.
• A person died in his closed garage, when he was trying to repair his vehicle with engine in running condition.
• A person working outside at terrace level became unconscious and died as the exhaust from wood fired room heater was nearby.

The above incidents indicate the need for educating the people about carbon monoxide poisoning and care to be taken.