A 9-year-old Oakland girl has been hospitalized after school officials said the mother of a schoolmate attacked her with a hammer.
The attack was reported Friday morning at Lafayette Elementary School in West Oakland. School officials said the woman lured the third grader into a bathroom during recess and began hitting her with a hammer.
The child was seriously injured, but is expected to recover, officials said.
School officials said the suspected attack may have been an act of revenge.
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"We don't know the reason for the attack. The early speculation -- and this is not definitive -- this act evolved out of a family feud, which is off campus and spilled into the school yard," said Troy Flint, Oakland Unified School District spokesman.
The suspect is the mother of a second-grade student who often volunteers at the school, officials said. She was arrested at the scene, police said.
An investigation is ongoing.