At least twenty Indian soldiers including a Colonel were killed in a "violent face-off" with Chinese troops at Galwan Valley in Ladakh 

The deadliest clash between the nuclear-armed neighbours for more than four decades.

Both sides blamed each other for Monday's clash in the precipitous, rocky terrain of the strategically important Galwan Valley, between China's Tibet and India's Ladakh region, which analysts described as "worrying".

The Indian Army in a statement said during the de-escalation process in the Galwan Valley, a violent face-off took place yesterday night with casualties on both sides.

Meanwhile, China, confirming the incident, said that Indian soldiers crossed the disputed border between the two countries.