China on Monday adopted a decidedly unfriendly posture to the Indian Army’s question asking if five civilians who went missing from Arunachal Pradesh days ago were in the custody of the People’s Liberation Army (PLA)

China has never recognised the “so-called ‘Arunachal Pradesh’, which is China's south Tibet region”, the Chinese foreign ministry spokesperson Zhao Lijian told a news briefing on Monday in response to a question about the missing Indians.

“We have no details to release yet about question on Indian Army sending a message to PLA about the five missing Indians in the region,” he added, denying knowledge of the abduction.

The Indian Army had told its Chinese counterpart about the five civilians, who were engaged as guides and porters by the Army in the Upper Subansiri district on the Sino-India border, on Saturday.

Those allegedly kidnapped have been identified as Toch Singkam, Prasat Ringling, Dongtu Ebiya, Tanu Baker and Ngaru Diri. They had gone for hunting in a jungle when they were allegedly kidnapped by the PLA.

Two members of the group returned home and informed the families of the other five that they had been whisked away by the Chinese troops from Sera-7, an Army patrol zone located about 12 km further north of Nacho. Nacho is the last administrative circle along the McMahon line and is around 120 km from the district headquarters Daporijo.

Indian government sources said the matter has not been escalated to a diplomatic level yet. "The discussion is only between our border post and theirs. We will have to wait to get more clarity," an officer said on the condition of anonymity.

Relations between India and China have hit a multi-decade low since clashes in Ladakh in June that killed 20 Indian soldiers. Both sides have since stepped up monitoring of their largely unsettled 3,488 km border.

"We spoke with them on the hotline and told them that it's suspected that some people have crossed across to your side and we will be grateful if you could hand them over back, as per what we do normally," Lieutenant Colonel Harsh Wardhan Pande, an Indian Army spokesman, told news agency Reuters.

"There is no earmarked line going through the forest or the mountains, so they keep moving here and there. So they might have gone there. It's a very normal thing," he said, adding they were yet to hear back from the Chinese.