Police say three Ohio residents have been charged with assaulting a prison guard who was burned by an exploding package left at his mailbox in central New York.

Oneida County Sheriff Robert Maciol (MAY'-shuhl) says Wednesday that the May 29 attack was intended to stop the 53-year-old victim from reporting an elder care scam against his mother in Ohio. Maciol says it wasn't related to Alan Dobransky's work as a corrections officer.

The sheriff says Dobransky suspected one of the accused, 58-year-old Cindy Shields of Conneaut, Ohio, stole money from his mother.

Also charged with assault were 58-year-old Keith Seppi and 63-year-old Donna Seppi, also Conneaut residents.

All three are jailed. It couldn't be determined if they have lawyers to comment for them.

Dobransky remains hospitalized in critical condition.