Heavy rains since Thursday night triggered the landslide at St. Marie, just two-three kilometres from Kurseyong town, early Friday.
The victims included three children aged 10, 3, and 1) and their father, police officer Nima Bhutiya told IANS over telephone. The children's mother had stepped out of the house at the time of the incident.
Traffic on a national highway linking West Bengal and Sikkim was snapped following another landslide at Kalimpong early Friday due to heavy rains.
"We tried to clear the debris to allow movement of light vehicles but a fresh landslide completely blocked the road," said Kalimpong Additional Police superintendent J. Dorji.
Published 17 June 2011, 05:57 IST