China said Monday that India is violating an 1890 border agreement between Britain and China that previous Indian governments have pledged to uphold, and it should be respected to end a "very serious" incursion by India.
The border standoff on a plateau next to the mountainous Indian state of Sikkim, which borders China, has ratcheted up tension between the neighboring giants who share a 3,500-km frontier, large parts of which are disputed.
According to the Chinese interpretation of events, Indian guards crossed into China's Donglang region early in June and obstructed work on a road on the plateau.