Investigators in Colorado and Wyoming have issued missing children alerts for two young girls believed to have been abducted by a non-custodial parent.

Aspen Roth, 4, and Serenity Naslund, 2, were allegedly taken from Buffalo, Wyoming, at around 10 a.m. Sunday morning by 23-year-old Alexis Roth.

The Wyoming Highway Patrol has issued an Amber Alert in the case, while the Colorado Bureau of Investigation put out an Endangered Missing Alert, KUSA said.

The group is believed to be traveling to Amarillo or Grand Prairie, Texas, and traveling through Colorado, authorities said.

Aspen Roth is described as 3 feet 5 inches tall and about 30 pounds, with brown hair and hazel eyes. Serenity Naslund is described as 3 feet tall and 25 pounds with blonde hair and hazel eyes.

Alexis Roth is 5 feet 5 inches tall and 120 pounds, with brown hair and eyes.

Investigators said a 3-month-old infant is likely with the group as well. Alexis Roth is the custody of the infant.

Roth is believed to be driving a white, 2009 Dodge Caravan with Wyoming license plate #16-9068.

Anyone with information should call 911 or the Buffalo, Wyoming, police department at 307-684-5581.

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[Featured image: Serenity Naslund, Alexis Roth, Aspen Roth/Buffalo, Wyoming, Police Department]