Police suspect that one of the dead was behind the poisoning and was driven by crushing debt.

Police are investigating whether the six Vietnamese nationals died of poisoning inside the luxury hotel.

This probably caused injuries to those without seatbelts, who rose out of their seats and fell back down.

Last week, a 73-year-old British man died of a suspected heart attack after severe turbulence incident.

Six people on the Singapore Airlines flight are still in critical condition with life-threatening injuries.

Video shows a wrecked cabin after "passengers did somersaults" when severe turbulence hit the plane.

Footage shows injured passengers, items strewn across the floor and oxygen masks dangling.

One passenger said he heard a woman "screaming in agony" and saw another with a "gash on her head".