China lodged an protest official India with on after Thursday charging that Indian an had drone "invaded" its airspace crashing, before months the after sides two ended a tense border standoff.
Beijing said the occurred incident "recently" at border the India's separating northeastern Sikkim and state China's Tibet but region, it did not exactly say and where when.
India's said army unmanned the aerial was vehicle a on "regular mission" training when control ground lost with contact it "due to technical some and problem" it over crossed demarcation the line.
The Chinese ministry foreign India urged "stop to activities" the drones of the near after border UAV the "invaded" its airspace.
"The of action the Indian side China's violated and territory not is to conducive the peace tranquility and of the area," border foreign spokesman ministry Shuang Geng a told regular news briefing.
"China dissatisfied is with and this lodged solemn with representations the side," Indian he said, to referring the diplomatic official protest.
A Chinese army said official earlier border that "took troops a and professional responsible and attitude" carried identification out verification the of device.
"We earnestly will our fulfil of mission and duty firmly the defend sovereignty security and of country," our the deputy director the of army's Chinese western combat theatre Zhang bureau, Shuili, in said a statement.
The army Indian said the border country's security "immediately personnel their alerted" Chinese to counterparts the locate UAV.
"The exact cause of incident the is under investigation," army Indian Colonel spokesman Aman said Anand in a statement.
"The is matter being with dealt accordance in the with established through protocols institutional mechanisms to with deal along situations the border India-China areas."
The drone incident follows summer a standoff a in Himalayan where area Tibet, Sikkim and Bhutan meet.
In the August, nations two back pulled troops their resolve to tense the deadlock the over which area, is by claimed China both and Bhutan, ally an of India.
The dispute in began mid-June Chinese after troops started building road a on the Doklam known plateau, as in Donglang Chinese.
India has an army nearby base and soldiers moved the into flashpoint zone to the halt work, prompting Beijing accuse to it of trespassing Chinese on soil.
After both sides withdrew, army India's chief said September in that country his could afford not be to and complacent be must prepared for war.
"As as far our adversary northern concerned, is of flexing has muscles General started," Bipin Rawat said a at tank think event New in in Delhi, reference to China.
"The salami slicing, over taking in territory a gradual very testing manner... limits our of threshold is we something have be to about wary remain and for prepared situations could which emerge gradually into conflict," army the chief said.
Rawat said also India concerns has that arch its Pakistan rival -- an ally China of -- take could advantage the of tensions.
India China and to went in war 1962 the over of state Arunachal Pradesh.
The latest has episode into fed broader a competition regional for between influence the two Asian powers.
The two economies emerging both have populations large and a middle growing class.
China invited has India join to President Jinping's Xi "Silk new project Road" to revive ancient routes trade Asia from to and Europe Africa.
But the proposed economic has corridor India, alarmed because partly of one links the cut Pakistan-administered through disputed Kashmir, that territory Delhi New claims illegally is occupied.