Officials said today that the landslide occurred at 11 PM last night between Rangpo on Sikkim border and Melli in West Bengal.
Border Road Organisation is trying to clear the debris. It has said that one-way traffic on the highway will be opened by the evening.
Some traffic to and from the landlocked mountain state is being diverted to the difficult alternative route via Monsong in Kalimpong in Darjeeling district.
The landslide followed heavy rains in north Bengal and Sikkim last week.
