One person was taken into custody as authorities searched for additional people for questioning in the death of a 1-year-old girl abducted from her home on a Montana Indian reservation.

Kenzley Olson was found dead on Wednesday in Poplar, a small town on the Fort Peck Indian Reservation. She had last been seen Tuesday, the Roosevelt County Sheriff's Office said in a statement.

"There may be others that are detained at some point," said county spokesman Lee Allmer. "No charges have been brought to my knowledge."

An Amber Alert was issued for Kenzley early Wednesday. Authorities initially said she was believed to be with a man and woman from North Dakota but later determined neither was involved.

The detained person was identified by the FBI as a female, but her name and age were not released. She was being questioned, authorities said.

Allmer said he did not know the relationship between the female subject and the victim and a cause of death had not been determined.

The Fort Peck Reservation is home to the Assiniboine and Sioux tribes and has a population of about 10,000.

Kenzley's death followed the February abduction of a 4-year-old girl from a public park in Wolf Point, a town on the reservation about 20 miles west of Poplar.

The victim was found alive several days later about six miles from a park. Authorities said her abductor had tried to kill her.

The defendant in that case, John William Lieba, 20, faces charges of kidnapping, attempted murder and aggravated sexual assault of a minor. He has pleaded not guilty.