Story highlights Rescuers have difficulty reaching affected sites along border

More snow is expected Friday

(CNN) At least 156 people have died along the Afghan-Pakistani border after three days of heavy snowfall caused a series of deadly avalanches Sunday.

The death toll is expected to rise as rescuers reach isolated regions where it's feared more people are trapped beneath the snow.

Most of the casualties occurred in Afghanistan, where at least 143 have been killed and 103 are reported injured and 300 civilian homes have been destroyed, said Omar Mohammadi, a spokesman for the National Disaster Management Authority.

Mohamaddi said that most of the victims were women and children, and that deaths were reported in the provinces of eastern Nuristan, northern Parwan, Sar-e-Pul, Badakhshan and eastern Wardak.

At least 50 were killed in the Barg-e-Matal district of Nuristan province -- to the north of Kabul -- where unrelenting snow has buried villages and closed roads to rescue workers.

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