The Lyon County sheriff says a five-year-old boy from George is being treated for severe head injuries after multiple blows — possibly from the claw end of a hammer.

The sheriff’s office says the child suffered a fractured eye socket and stab wounds to his back along with other injuries including bite marks and a volleyball-sized scab area on his back which may be the result of a burn.

Authorities say some of the injuries may have been caused by the child’s six-year-old brother.

On Tuesday, the child’s mother, Nikki Moreno, was arrested on a child endangerment charge. Juan Carlos Moreno was also arrested on the same charge. Both are being held in the Lyon County Jail on $10,000 bond each.