An Afghan official says talks in Kabul between representatives of four countries trying to end Afghanistan's war with the Taliban are likely to set a date for a face-to-face meeting between the two sides.

Representatives of Afghanistan, Pakistan, China and the United States are due to meet Tuesday for a fourth round of discussions setting conditions for eventual peace talks between Kabul and the Taliban.

Javid Faisal, deputy spokesman for Afghan Chief Executive Abdullah Abdullah, says the delegates "should give a date for the first direct peace talks."

Earlier meetings have set a roadmap for formal peace talks. The insurgency is now in its 15th year.

The process is expected to take months, possibly years. These preliminary meetings setting conditions for a future dialogue do not include the Taliban.