Updated

A Tempe woman has been arrested in Florida on suspicion of custodial interference but police say the whereabouts of her infant son remain unknown.

Authorities say 23-year-old Elizabeth Johnson was taken into custody Wednesday by Miami Beach police. They say Johnson was in San Antonio, Texas, from Dec. 22 to 27.

Johnson was scheduled to appear in Maricopa County Superior Court's Family Court in Phoenix for a Dec. 28 custodial hearing. But authorities say she failed to appear and lost custodial rights to 8-month-old Gabriel Johnson.

Authorities say Elizabeth Johnson has yet to reveal the whereabouts of her baby and they also are searching for the car she was driving.