There has been an increase in activities by the Chinese air force in the region in the last few weeks following which the Army has decided to deploy troops with shoulder-fired missiles, the sources said.
The Indian Army
has significantly increased deployment of troops and weaponry including tanks and artillery guns in various sensitive sectors along the Line of Actual Control (LAC) in the last few weeks.
The IAF has also significantly enhanced deployment of its frontline jets, attack helicopters and transport fleet in all its key bases guarding the airspace along the LAC.
It has enhanced the deployment of its air defence
systems in the region.
The IAF has already moved a sizeable number of its frontline fighter jets including Sukhoi 30 MKI, Jaguar and Mirage 2000 aircraft to several key airbases including Leh and Srinagar.
It has also deployed Apache attack choppers and Chinook heavy-lift helicopters to transport troops to various forward locations.
The frontline fighter jets have increased their sorties in Ladakh and nearby areas.
India and China have held several rounds of military and diplomatic talks in the last two-and-half months but no significant headway has been made in resolution of the border row in eastern Ladakh.
The formal process of disengagement of troops began on July 6, a day after a nearly two-hour telephonic conversation between National Security Advisor Ajit Doval
and Chinese Foreign Minister Wang Yi on ways to bring down tensions in the area.
However, the process has not moved forward since mid-July.
The Chinese People's Liberation Army has pulled back from Galwan Valley and certain other friction points but the withdrawal of troops has not moved forward in Pangong Tso, Depsang and a couple of other areas, sources said.
In the five rounds of Corps Commander-level talks, the Indian side has been insisting on complete disengagement of Chinese troops at the earliest, and immediate restoration of status quo ante in all areas of eastern Ladakh prior to April.
Even as both sides have been engaged in diplomatic and military talks, the Indian Army
is making elaborate preparations to maintain its current strength of troops in all key areas in eastern Ladakh in the harsh winter months.