Quintana Roo state prosecutors said a preliminary manslaughter investigation indicated the driver lost control of the bus and when he tried to get back on the narrow highway, the bus flipped, struck a tree and landed in vegetation along the roadside.
Seven Americans and two Swedes were among the injured, Quintana Roo state Civil Defense spokesman Vicente Martin said. He said authorities hadn't yet established the nationalities of the dead.
No conclusions have been drawn as to the cause of the fire, which took out the airport's power supply and also its backup electricity for about 11 hours Sunday.
Delta Air Lines and other carriers that operate out of Atlanta's busy airport said they expected to be running normally Tuesday after a fire and blackout there forced the cancellation of over 1,500 flights days before the start of the Christmas rush.
Recent deaths from carbon monoxide and thin ice are a reminder that wintertime hazards in Minnesota take lives every year, and that many are preventable.
An Amtrak train making the first-ever run along a faster new route hurtled off an overpass south of Seattle on Monday and spilled some of its cars onto the highway below, killing at least three people, injuring more than 100 and crushing two vehicles, authorities said.
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