The sewage system is located in the southwest of the Achaemenid city near the city of Shiraz.
The team dug down about five meters to reach the canal, Asadi said.
A number of stone bas-reliefs have also been discovered during the excavations, he added.
Asadi said that the sewage system branches off into many canals, which extend to the south and then turn to the east.
Story: Tehran Times | Photo: ISNA/Abba Khashandish