US envoy for peace in Afghanistan Zalmay Khalilzad speaks during a debate at Tolo TV channel in Kabul, Afghanistan, Apr 28, 2019. (Photo: Reuters/Omar Sobhani)

KABUL: Negotiators for the United States and Taliban Islamist militants will start on Saturday (Jun 29) a seventh round of peace talks to end the war in Afghanistan, offering what one US official called a "make-or-break moment" to halt 18 years of fighting.