China denied on Wednesday plans to construct a tunnel to divert River Brahmaputra amid reports of highly polluted waters from its tributary Siang flowing into India.

“I would like to point out that China’s position on the eastern part of the China-India border is consistent and clear,” foreign ministry spokesperson Lu Kang said in response to questions about the reports on blackened, muddy waters with cement and sledge of the Siang river in Arunachal Pradesh.

He refuted reports that it may due to a tunnel being constructed on Chinese side.

“I have never heard of the project mentioned by the Indian side. It is hoped that the Indian side will not conduct unfounded speculation and reports,” he said in a written response to a question in this regard.