ANKARA, Turkey (AP) — Turkey says it will press for clear steps toward a political resolution of the conflict in Syria during a Saturday summit gathering the leaders of Turkey, France, Germany and Russia.

Presidential spokesman Ibrahim Kalin said Turkey would also push during the summit in Istanbul for the preservation of an agreement that set up a demilitarized zone around the northwestern Syrian province of Idlib.

The agreement reached last month between Russia and Syria prevented a government offensive on the last rebel stronghold in the country.

Idlib has been calm since, though some militant groups have not met an Oct. 15 deadline to evacuate the demilitarized zone.

Kalin says Turkey also expects the four leaders to agree on establishing a committee that would draft a new constitution for Syria.