A video of the incident, showing the teenager, with his hands tied, being beaten up at a public place has gone viral.

Rights groups in the Himalayan country point to overt caste-based discrimination, demand political investigation into murders.

Rights groups in the Himalayan country point to overt caste-based discrimination, demand political investigation into murders.

The workers are mostly from West Bengal and Bihar.

Men, women and children say they are stuck without work or food.

The map follows the construction of a road from India up to the Chinese border in Uttarakhand and the suggestion by the Indian army chief that Nepal was protesting 'at the behest' of China.

Nepal has protested India's construction of a road from Pithoragadh to the Chinese border, claiming a part of it passes through its territory.

Hundreds of Nepalese workers remain in India and have been attempting to cross the border without success.