Tensions are mounting between India and China over their disputed Himalayan border and shared water resources ahead of a visit to New Delhi next month by Chinese Premier Li Keqiang.

As China's ties with its East Asian neighbors, especially Japan, have become fraught over territorial disputes in the East and South China seas, Beijing and New Delhi have been attempting to dial down historical tensions as bilateral trade flourishes.

But a series of alleged cross-border incidents since mid-April have once again raised the temperature between India and China, who fought a 1962 border war that Beijing won and regard themselves as regional powers.

Indian authorities alleged this week that on April 15 they noticed that Chinese troops set up a post 6 miles inside their territory in the remote Himalayan area of Ladakh and remain there. The de facto border in the area, known as the Line of Actual Control, is disputed.

A week later, Indian media reported that Chinese helicopters flew over an Indian military base in the same area. Indian officials declined to comment on this allegation.