India, July 9 -- Arunachal Pradesh chief minister Pema Khandu on Tuesday said China's mega dam being built near the state border will be a "ticking water bomb" and could pose an existential threat.

In an interview with news agency PTI, Pema Khandu said the world's largest dam project on the Yarlung Tsangpo river, the Tibetan name for the River Brahmaputra, is a matter of grave concern as China is not a signatory to the international water treaty that could have forced it to abide by international norms.

"The issue is that China cannot be trusted. No one knows what they might do," Khandu said in the interview.

"Setting aside the military threat from China, it seems to me that this is a far bigger issue than anything else. It is going to...