Delhi says Chinese dammed a river and lay in wait for clash in which 20 Indians died

India has accused Chinese troops of meticulously preparing an attack on its soldiers on the treacherous Himalayan border, claiming they erected a tent on the Indian side, dammed a river, brought in machinery and then lay in wait with stones and batons wrapped in barbed wire.

The incident on Monday night, in which 20 Indian soldiers died and 76 were injured, was the worst violence between India and China for 45 years. China has not said whether it sustained any casualties.

Indian media report release came after high-level talks between the India army and the PLA

China has freed 10 Indian soldiers seized in a high-altitude border clash in the Himalayas which left at least 20 Indian soldiers dead, media reports said on Friday.

The release follows several rounds of talks between the two sides in a bid to ease tensions after the battle on Monday, in which scores of troops from the two sides fought with nail-studded batons and hurled rocks at each other.

India shocked by Himalayan border clash in which unarmed troops fought in the dark

The hand-to-hand combat lasted hours, on steep, jagged terrain, with iron bars, rocks and fists. Neither side carried guns. Most of the soldiers killed in the worst fighting between India and China in 60 years lost their footing or were knocked from the narrow Himalayan ridge, plunging to their deaths.

India has reacted with shock and caution to the loss of at least 20 soldiers on its disputed border with China, with images of the Chinese president, Xi Jinping, burned in Indian cities.