Local people tried to dig out victims trapped under a massive river of mud that engulfed Aab Bareek village in Badakhshan province where little sign remained of hundreds of destroyed homes.
The United Nations confirmed that 350 people were dead, and provincial officials said more than 2,000 could be still missing 24 hours after the disaster.
Emergency workers arrived this morning to be confronted by the enormous scale of the landslide and hundreds of homeless families.
"There is fear of another landslide. Our assessment team have seen a crack in a nearby hill.
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"They have only been able to find the body of a woman and a man.
"We have started distributing food... But we don't have enough tents for all the 700 families who spent the night outside. There are around 2,000 people -- women, children, elders -- without homes."
The site is expected to be designated a mass grave and memorial services have been planned for later today.
Villagers were at Friday prayers in two mosques when they were entombed by a tide of debris, and a second landslide hit many who had rushed to assist those in need.
"All the relevant UN agencies - together with the Afghan Red Crescent Society and NGO partners - are already on the ground," the UN mission in Afghanistan said.
"Key needs for them are water, medical support, counseling support, food and emergency shelter."
President Hamid Karzai expressed his condolences to those affected and said immediate action was being taken to find survivors.