Gila River Valley police found an infant's body inside a partially buried backpack Monday afternoon near State Route 87 outside of Sacaton.

An officer was out on patrol around 12:30 p.m. and was looking through the desert area when he noticed a partially buried bag. Upon opening the bag he realized there was a baby's body inside, wrapped in a plastic bed sheet. The sheet was taped around the infant, said Alia Maisonet, public information officer for police.

The officer immediately called investigators and the baby's body was sent to the Pima County Medical Examiner's office. The gender of the baby is currently unknown. The officer left the baby wrapped in the sheet.

More information is expected to be available late Tuesday morning, Maisonet said.

Police are seeking help from anyone who may know more about the infant. The Gila River Valley police can be reached at (520) 562-4511.