Islamabad: Pakistan has opposed India's trekking expedition at Siachen, saying it could undermine the ongoing peace process.

"India should desist from acts that cast shadow on the peace process," the Dawn quoted the country's Foreign Office spokesman Mohammad Sadiq as saying at a weekly briefing.

The trekkers underwent acclimatisation at the Sia-chen base camp yesterday before starting their long trek that ends on October 19 from the base camp to the Kumar post.

"Pakistan has taken up the matter with India expressing concern over the expedition," he said while reiterating his protest against the trekking expedition.

Similar protests by Pakistan had been ignored by India last year when it opened up the 72-km-long glacier for civilian tourism.

Clear violation

Regarding the issue of reduction of the water flow in the Chenab River, Sadiq said that Pakistan's Indus Water Commissioner would inspect the Baglihar Dam from October 18.

The spokesman said Pakistan could intensify its efforts to get the controversy resolved.

"We are seriously concerned over significant reduction in flow of water in Chenab River. It has caused extensive damage to our agriculture. The Indian action is a clear violation of Indus Waters Treaty."