Governor Hasan Canpolat of Sivas told private CNN-Turk television that 21 houses were buried in the landslide and that between 12 and 14 people were missing. Communications with the affected area are poor and an official in the governors office said that earlier reports that 21 people were missing were not correct.
"Rescue efforts are underway," Canpolat said. "We will hopefully reach and save anyone still alive."
Canpolat said the buried homes were located on a slippery slope and it was too dangerous to use heavy machinery for rescue operations. Local villagers and paramilitary police were digging in the area in the hopes of saving villagers.
Ambulances were sent in from neighboring towns.
Sivas province is some 450 kilometers (280 miles) southeast of Ankara.
Landslides and mudslides are not uncommon in central Turkey and have been blamed on the extensive deforestation of central Anatolia and poor city planning.
In 1995, a mudslide in the southern town of Senirkent killed 74 people. Sixty-four people were killed in a landslide in the northern town of Catak in 1988.