Officials with the U.S. Fish and Wildlife Service say a single gunshot wound killed Mexican gray wolf pup found dead in eastern Arizona in late March.

Agents with the federal agency and the Arizona Game and Fish Department recovered the pup's carcass along a Forest Service road near the town of Alpine. The agency also identified the wolf as a female pup that belonged to the Hawks Nest Pack.

Several organizations are offering rewards for information leading to the conviction of the person or people responsible for the illegal shooting. Federal wildlife officials are offering up to $10,000, and Arizona's Operation Game Thief is adding another $1,000.

Other organizations and private individuals have pledged an additional $46,000 in reward money.

The Mexican gray wolf once roamed over large parts of the southwest U.S., but was nearly extinct by the early 1970s. The animal was added to the Endangered Species List in 1976.