The landslide happened late on Tuesday in Hilalabad village, about 110km east of Gilgit, the capital of the country's Northern Areas.
It followed reports by Pakistani officials on Tuesday that at least 27 people had been killed in floods triggered by heavy monsoon rains.
They said five people had died in Punjab and 22 more in Pakistan's North West Frontier province.
At least 12,000 houses were destroyed and there were fears that more bodies will be found.
Mohammed Sajjad, the Punjab relief commissioner, said on Tuesday that 82,000 people had been displaced in the eastern province.
The worst affected districts were Rajanpur and Dera Ghazi Khan.
Pakistan's meteorological department said the heavy rains should cease in a few days, and there were no high floods reported from rivers flowing down from the western Himalayas.
"The catchment areas like Kashmir and Northern Area have not received enough rains to cause floods in rivers," said Qamar-uz-Zaman, a senior meteorologist.