CULIACAN, Sinaloa (AP) — Investigators have found at least a dozen sets of skeletal remains in a series of pits in the northwestern Mexican state of Sinaloa.

The discovery comes just hours after authorities confirmed that 116 bodies had been pulled from pits in the northern state of Tamaulipas, at the eastern end of the U.S.-Mexico border.

The Sinaloa state prosecutors’ office says the pits were discovered by a farmer who reported unusual odors coming from a field.

Prosecution spokesman Martin Gastelum said seven pits were found late Tuesday and excavations continued Wednesday.

Two sets of remains appeared to belong to women who had been reported missing in October.

Sinaloa is home to Mexico’s most powerful drug cartel.

Copyright 2011 The Associated Press.