A Huntington Beach resident who allegedly took her granddaughter without the mother's permission is awaiting extradition to California.

The Maricopa County Sheriff's Office in Arizona is in custody of Carolyn Ferguson, 57, who is being charged by Huntington Beach police on suspicion of child stealing, according to local authorities.

Family members told officials that Ferguson had been "talking about the end of the world and seemingly deteriorating in recent days," according to a Huntington Beach Police Department news release.

The suspect's family also said that she had a history of mental health problems and had recently stopped taking her medication, police said.

An Amber Alert was issued Wednesday after 6-month-old Laylani Mosley was reported missing. She had last been seen at her home around 9 a.m. with Ferguson.

Family members told police that the suspect left without her cellphone or food for Laylani, who was still being breast fed, police said.

At about 6:50 p.m. that day, a convenience store clerk in Tonopah, Ariz. saw the two and told police that Ferguson "was acting strangely and the baby appeared to be poorly cared of," according to the statement.

The clerk called 911 after someone recognized Ferguson and Laylani from the Amber Alert, police said.

Officials recovered Ferguson's white Chrysler PT Cruiser along Interstate 10 in Arizona.

Laylani was taken to a local hospital and was in good health, police said. She was reunited with her family late Wednesday.

— Anthony Clark Carpio

Twitter: @acocarpio