A BONE found in the backyard of a house in Merrylands on Thursday could belong to missing Auburn man Cengiz Sarac.
Police excavated the backyard of the house, which is in Excelsior Street, after a ground-penetrating radar detected something abnormal beneath the dirt surface.
The search uncovered a number of items, including a bone that is now being examined forensically.
A police spokesman told the Sun the forensic tests could take months.
Mr Sarac was known to police and was last seen leaving his home in August 2005.
Strike force Salacia was set up to investigate his disappearance. The police are still treating Mr Sarac's disappearance as suspicious.
They want to speak to three men who are believed to have spoken to him at Granville station on July 2005, and then on August 2, the day he was last seen.
They believe the men regularly used a white car that was similar to the Ford Falcon Mr Sarac was seen leaving his home in that same day.
Superintendent Phil Rogerson of Flemington police said the investigation had led police to implement several strategies.
"These have included searching Auburn's Duck Creek, the arrest and charge of an Auburn man, and the execution of a number of crime scene warrants," he said.
Emergency services waded through Duck's Creek looking for Mr Sarac's skeletal remains but found no trace.