New Delhi: Chinese helicopters had allegedly violated the Indian air space and flew over Depsang in Daulat Beg Oldi (DBO) sector in Ladakh region last week, media reports said on Tuesday.
The incident happened on Apr 15.
Chinese troops on the same day had entered the Indian territory in the DBO sector in eastern Ladakh, reports said.
Media reports said the Chinese troops (PLA or People's Liberation Army) also pitched tent inside Indian territory.
Meanwhile, military commanders of India and China on Tuesday held a second flag meeting at DBO sector in Ladakh to discuss the recent standoff between the two Asian countries along the border in Ladakh region.
The meeting took place a day after India said it would do everything to protect its territorial interest.
On the Chinese incursion issue, Defence Minister AK Antony told media: "India will take every step to protect its interests."
China earlier negated reports that its troops had crossed into Indian territory.
"We stand by our Foreign Ministry's statement. Chinese troops have not trespassed into India," an official at the Chinese embassy in New Delhi told NDTV.
The two nations are in touch on operationalising the recently set up Working Mechanism for Consultation and Coordination on India-China Border Affairs.
Antony last month had told the Parliament that he is aware of China's military modernization and infrastructure development along the India-China border.
He said, along the border with China, there are sectors where both countries have differing perceptions of the border.
India and China bicker over territorial boundaries, especially over Arunachal Pradesh and parts of Ladakh under Jammu and Kashmir.
In 1962 China and India fought a brief war over Aksai Chin (Ladakh region) and Arunachal Pradesh, but in 1993 and 1996 the two countries signed agreements to respect the Line of Actual Control.
The 4057 km-long Line of Actual Control (LAC) is the effective border between India and People's Republic of China (PRC).