Two Bhutanese and a non-Bhutanese succumbed to injuries after the Indian registered vehicle they were travelling in fell 400 metres off the road at the 3.5km point on the Phuentsholing-Thimphu highway. The incident occurred at 8:30pm on September 9.
The two Bhutanese, a man and a woman died at the hospital, while the man from across the border died on impact.
The Bhutanese man was a 39-year-old faculty member of College of Science and Technology while the 33-year old woman was a housewife and from Mongar.
The driver, the fourth person in the vehicle, who is from across the border facture his left arm and is in stable condition.
The vehicle was travelling from CST, Phuentsholing during the time of accident. The main cause of the accident, according to police sources was speeding, which made the vehicle lose control as it was raining heavily.
Meanwhile, the point where the accident occurred is argued as a risky curb where accidents have been reported in the past.