Authorities have closed trails at Southern California's Mount Baldy following the death of the second hiker in a week.

San Bernardino County sheriff's officials say 47-year-old Dong Xing Liu died Saturday after he slipped and fell in the Icehouse Saddle area. Liu's wife was also injured and hospitalized in unknown condition.

Mount Baldy Fire Chief Graham Hendrickson tells the Riverside Press-Enterprise that a dozen people had to be airlifted Saturday from the mountain, where icy and windy conditions have been common.

Twenty-three-year-old Daniel Nguyen fell 1,500 feet to his death Feb. 2 when he reached out his hand to save a friend who had slipped while hiking the Devil's Backbone trail.

Hendrickson says trails will be closed until at least Tuesday, when officials will evaluate conditions.