Updated

A reward of up to $3,500 is being offered for information that could lead to the arrest of whoever is responsible for the death of an Arizona toddler.

Authorities believe that skeletal remains discovered at a central Arizona campground this week are those of 2-year-old Sylar Newton of Flagstaff.

Sylar was camping with his custodial mother and her family on July 24 when they reported he had wandered away.

Authorities say they believe someone tried to hide the remains, and a criminal investigation is under way. No suspects have been named.

The Yavapai Silent Witness program is offering a $1,000 cash reward, and the FBI is offering an additional $2,500 for information that could lead to the arrest and conviction of those responsible.