An emergency phone call with no one on the line led authorities to the stabbed bodies of two children, and authorities searched for their mother for questioning Thursday.

The grandfather of the children, Charles Barn, was beaten but survived.

Felicia Williams, 26, was wanted for aggravated assault on her father, and authorities want to ask her about the children's deaths, said Maj. Murray Kogod of the Barrow County sheriff's department.

Kogod identified the children as Elexis Nicole Hill, 9, and James Ross Hill, 4.

The bodies were found Wednesday. A dispatcher listening to the emergency call heard a person in the background saying someone was bleeding, Kogod said. Authorities traced the call to the home, where the children were pronounced dead.

Relatives said they were stunned.

"They just had a great and beautiful Christmas," said Williams' sister, Tamara Williams.