External Affairs Ministry Spokesperson Gopal Baglay also asserted that Arunachal Pradesh is an integral part of India.
"Assigning invented names to towns of your neighbour does not make illegal territorial claims legal. Arunachal Pradesh is and will always be an integral part of India," Baglay told reporters here.
When asked if India has taken up the matter with China, he said the Chinese government has not communicated anything officially so far and the ministry has seen only reports on the development.
The Chinese move came days after Beijing lodged strong protests with India over the Dalai Lama's visit to the frontier state.