An Amber Alert was issued and then canceled hours later Wednesday after a 6-month-old girl was reported missing.
Laylani Mosley was last seen at her home about 9 a.m. with her grandmother Carolyn Ferguson, 57, according to the Huntington Beach Police Department.
About 7 p.m., the baby and grandmother were found in Arizona, police said.
"Ferguson has a history of mental illness and is in need of medication," police officials said in a statement.
No additional information was released by police. A news conference is slated for later in the evening.
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7:33 p.m.: This story was updated with information that the baby and grandmother were located in Arizona.
This story was originally published at 4:36 p.m.