OMAHA, Neb. -- The Federal Bureau of Investigation is looking into the death of a Native American woman in northeast Nebraska.

According to a news release issued Wednesday, the FBI Omaha Sioux City Resident Agency is investigating the death of 19-year-old Ashleigh Wabasha.

Wabasha was last seen on March 27th on the Santee Sioux Reservation. Her body was found April 18th.

A spokesperson for the FBI says that it remains an ongoing investigation, and as a result, further details on the case cannot yet be released.

The FBI notes that is responsible for investigating the most serious crimes on reservations. Three conditions must be met in order for the FBI to investigate an alleged crime on a reservation: the victim or subject must be Native; the crime must have occurred on a reservation where the FBI has jurisdiction; and the investigation must be predicated, or based, on a criminal act for which the FBI has jurisdiction—including crimes that wouldn’t fall under FBI jurisdiction if they occurred outside a reservation.

Just a day prior to the discovery of Wabasha's body, a $1,000 reward had been offered for any credible information that would lead to finding or contacting her.

Santee Sioux Nation Police Department and the Knox County Sheriff's Office had been investigating Wabasha's disappearance prior to the discovery of her body.