The deceased persons are reported to be labourers from nearby States who were working at the construction site of a five star hotel.
It is feared that more people are trapped in the landslide and rescue operations are underway.
More rain-triggered landslides are also being reported from different part of Tawang, damaging electric poles and disrupting power supply.
Chief Minister Kalikho Pul has asked Tawang Deputy Commissioner for a detailed report on the landslides.
The incident occurred at 3 AM when labourers engaged in construction works were inside the camp at a place four km away from Tawang town, Additional Deputy Commissioner (Headquarters) Lod Gambo said.
The PWD road in between New Lebrang and government higher secondary school has also been blocked due to landslide, while damages to residential buildings have been reported from the area.
Heavy rainfall in the past few days in the district resulted in a flood-like situation which severely damaged the Kitpi Ph-I and Ph-II hydel projects.
Power department officials said restoration work could not be started due to the continuous rain and both the power stations had been shut down due to the damage.
Taking serious note of the situation, DC Duly Kamduk has directed the department concerned for assessment and submission of detailed report for action.