"In 2011, the Chinese army made at least four incursions in Arunachal Pradesh," said parliamentarian from the state Takam Sanjoy.
What sets the recent Ladakh incident apart, however, is that this did not appear to be just another transgression.
As soon as Indo-Tibetan Border Police personnel noticed Chinese forces on this side of the Line of Actual Control, they followed the drill of showing them banners indicating that they had crossed over.
Security sources said the ITBP did not realise that the Chinese were quietly pitching their tent. "We spotted the tent later when an aerial survey was carried out," an official said, pointing the move had intrigued them.
In previous instances, the Chinese would usually step back after registering their presence. The ITBP too has set up a tent, about 300-500 metre away.
The security establishment believes that a diplomatic initiative appeared to be the only way to break the logjam.