The Chinese military alleged on Thursday that an Indian drone intruded into China's airspace and crashed."The Indian UAV (unmanned aerial vehicle) intruded into China's airspace and crashed recently, and Chinese border troops have conducted identification and verification over the vehicle," Xinhua news agency quoted Zhang Shuili, deputy head of the combat bureau of the Western Theater Command's joint staff department, as saying."India's move has infringed upon China's territorial sovereignty and we are strongly dissatisfied with and opposed to this."We will fulfil our mission and responsibility and defend China's national sovereignty and security resolutely," he added.