BEIJING: China lodged an official protest with India yesterday after charging that an Indian drone had "invaded" its airspace before crashing, months after the two sides ended a tense border standoff, reports AFP. Beijing said the incident occurred "recently" at the border separating India's northeastern Sikkim state and China's Tibet region, but it did not say exactly where and when. India's army said the unmanned aerial vehicle was on a "regular training mission" when ground control lost contact with it "due to some technical problem" and it crossed over the demarcation line. The Chinese foreign ministry urged India to "stop the activities" of drones near the border after the UAV "invaded" its airspace. "The action of the Indian side violated China's territory and is not conducive to the peace and tranquility of the border area," foreign ministry spokesman Geng Shuang told a regular news briefing.