Pakistan on Monday urged the Taliban to remain engaged in the Afghan peace process after the armed group said it would now shun summits about Afghanistan until all foreign forces had left.

The decision was taken after the United States said last week it would withdraw all troops by Sept. 11 this year, later than a May 1 deadline set out by the previous administration.

“They take their own decisions but we will do whatever we can to convince them that it is in their national interest to remain engaged,” Pakistani Foreign Minister Shah Mahmood Qureshi said of the Taliban in an interview with Reuters in Abu Dhabi.

The refusal has thrown the peace process into disarray with Turkey scheduled to host a summit this Saturday, which diplomats had hoped would create new momentum towards a political settlement between the Taliban and Afghan government.

The Taliban ruled Afghanistan from 1996 to 2001 when they were ousted by U.S.-led forces, but they still control wide areas.

Qureshi said delays to the withdrawal were always a possibility due to logistics but that the Taliban had largely succeeded in their objective for foreign troops to withdraw and so should show flexibility towards the new Sept. 11 deadline.

“The troops will be out and a date has been given and the process starts on the 1st of May and goes on until the 11th of September so there is a definite time frame,” Qureshi said.

He also said he had no contact with the Taliban but that he believed the insurgent group would benefit by remaining engaged in the process, suggesting that they show patience and perseverance.

Pakistan, which helped facilitate U.S.-Taliban negotiations in Doha that resulted in the initial May 1 withdrawal deal, wields considerable influence with the Taliban.

The insurgents have sanctuaries in Pakistan, whose main military-run intelligence service gives them support, according to U.S. and Afghan officials. Pakistan denies the allegation.

Qureshi said he fears violence could escalate if the peace process remains deadlocked, plunging Afghanistan into civil war and leading to an exodus of Afghans.

Pakistan, which hosts close to 3 million Afghan refugees and economic migrants, has built 90% of a fence along its disputed 2,500 km (1,500 mile) border with Afghanistan and would hopefully be completed by September, he said.

He also said Pakistan was ready to engage in direct dialogue with arch-rival India once Jammu and Kashmir statehood was restored, which New Delhi in 2019 split into territories.

“We are two atomic powers that cannot, should not go into a direct conflict. It would be suicidal,” Qureshi said.

But he said he had no plans to meet with his Indian counterpart is also in the United Arab Emirates this week.

Top intelligence officers from India and Pakistan held secret talks in Dubai in January in a new effort to calm military tension over the disputed Himalayan region of Kashmir, sources have told Reuters