In a major policy shift, Prime Minister Imran Khan said his government had changed Pakistan's decades-long policy of pushing for "strategic depth" in Afghanistan to ensure that there was a friendly government there.

"Any Afghan government chosen by the people is who Pakistan should deal with," Khan said, adding that Pakistan "should not try to do any manipulation in Afghanistan".

Pakistan has long been accused of harbouring leaders and fighters of the Taliban, whom Islamabad helped to power in 1996, even as the insurgent group fought U.S.-led foreign troops. Pakistan is pushing for a political settlement in Afghanistan before foreign troops leave later this year, to reduce the risk of civil war in its western neighbour.

Prime Minister Khan said Pakistan is pushing for a political settlement in Afghanistan before foreign troops leave later this year, to reduce the risk of civil war in its western neighbour.

The United States has said it will withdraw all its troops from Afghanistan on Sept. 11 after a two-decade presence. More than 20 allied countries plan to follow suit.

"There is a lot of fear right now in Pakistan and I assure you that we are trying our level best that there is some sort of political settlement before the Americans leave," Khan told Reuters on Friday at his official residence in Islamabad.

Violence in Afghanistan has risen sharply since the troop withdrawal announcement, with the insurgent Taliban resisting pressure from Washington and its allies to agree to a political understanding leading to a peace deal.

"Since the moment the Americans gave a date, of when they were going to leave Afghanistan ... the Taliban feel they have won the war," Khan said, adding it was not going to be easy to get concessions from the Taliban after the U.S. decision.

Khan said Pakistan would suffer the most, after Afghanistan itself, if there was civil war and a refugee crisis. "And then there would be pressure on us to jump in and become a part of it," Khan said.

Khan said a lot depended on U.S. special envoy Zalmay Khalilzad, with Pakistan's and Afghanistan's help, to carve out a settlement to avoid more bloodshed.