1 Dead, 2 Injured After Family Falls from Chairlift

Authorities are investigating what caused a family of three from Texas to fall from a chairlift at the Ski Granby Ranch in Colorado on Thursday, leaving the mother, 40, dead and her two daughters, 12 and 9, injured.
1:50 | 12/30/16

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Transcript for 1 Dead, 2 Injured After Family Falls from Chairlift
Meanwhile, a fatal accident on the slopes in Colorado, I mother and her two daughters when they fell out of a chair lift. The mom did not survive. How did this happen? ABC's Clayton Sandell is on the story from Aurora. Good morning, Clayton. Reporter: And good morning, Dan. We've here at the children's hospital where one of those girls was injured and medevacked and injured in an accident that experts tell us is extremely rare. In morning authorities are investigating a deadly accident on the slopes. Ems station one respond to ski Granby ranch. Reporter: A 40-year-old mother from Texas and her two daughters falling Thursday from this chair lift at the ski Granby ranch in Colorado. We do know they fell from the chair lift and immediately ski patrol was on scene. Reporter: Paramedics rushing the family to hospitals transporting one 9-year-old girl by helicopter. Her 12-year-old sister by ambulance. Their mother did not survive the fall. Investigators are now trying to determine exactly how and why the three fell out. It's a sad day in the ski business. This type of incident is extremely rare. Reporter: Statistics show chair lifts are normally very safe. Over the past 40 years just 12 people have died from a malfunction. The ski industry says lifts are safer than elevators. But accidents do happen. Last year seven people were injured when this ski lift in Maine suddenly started rolling backwards. Ow, my arm. Reporter: This boy's backpack got caught leaving him dangling and rescue workers putting him to safety. You're all right. Reporter: Now this morning we still don't know whether this was a mechanical issue or rider error but either way until investigators figure it out that ski lift will be shut down. Dan, Paula. Just so incredibly sad. Clayton, thank you. Thinking of that family this morning.

This transcript has been automatically generated and may not be 100% accurate.

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