All 23 were ethnic Dao people living in four houses that were completely buried under the stones and mud after the landslide, said Luu Minh Thien, a local police officer.
The landslide occurred 8 p.m. Monday night after two days of torrential rain, Thien said from Bat Xat district in the northern, mountainous province of Lao Cai.
"We are cooperating with the local people's committee and local military unit in launching a rescue operation to find the missing 13 people,'' said Thien from the province 345 kilometres northwest of Hanoi.
Last Friday, two people were killed in another landslide near the popular tourist destination of Sapa, also in Lao Cai province.
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